feat(editor): migrate typst mermaid to native (#14499)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Native/WASM Mermaid and Typst SVG preview rendering on desktop and
mobile, plus cross-platform Preview plugin integrations.

* **Improvements**
* Centralized, sanitized rendering bridge with automatic Typst
font-directory handling and configurable native renderer selection.
* More consistent and robust error serialization and worker-backed
preview flows for improved stability and performance.

* **Tests**
* Extensive unit and integration tests for preview rendering, font
discovery, sanitization, and error serialization.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Cargo.toml

@@ -36,7 +36,7 @@ resolver = "3"
   criterion2 = { version = "3", default-features = false }
   crossbeam-channel = "0.5"
   dispatch2 = "0.3"
-  docx-parser = { git = "https://github.com/toeverything/docx-parser" }
+  docx-parser = { git = "https://github.com/toeverything/docx-parser", rev = "380beea" }
   dotenvy = "0.15"
   file-format = { version = "0.28", features = ["reader"] }
   homedir = "0.3"
@@ -59,6 +59,7 @@ resolver = "3"
   lru = "0.16"
   matroska = "0.30"
   memory-indexer = "0.3.0"
+  mermaid-rs-renderer = { git = "https://github.com/toeverything/mermaid-rs-renderer", rev = "fba9097", default-features = false }
   mimalloc = "0.1"
   mp4parse = "0.17"
   nanoid = "0.4"
@@ -122,6 +123,14 @@ resolver = "3"
   tree-sitter-rust = { version = "0.24" }
   tree-sitter-scala = { version = "0.24" }
   tree-sitter-typescript = { version = "0.23" }
+  typst = "0.14.2"
+  typst-as-lib = { version = "0.15.4", default-features = false, features = [
+    "packages",
+    "typst-kit-embed-fonts",
+    "typst-kit-fonts",
+    "ureq",
+  ] }
+  typst-svg = "0.14.2"
   uniffi = "0.29"
   url = { version = "2.5" }
   uuid = "1.8"

blocksuite/affine/blocks/bookmark/package.json

@@ -32,6 +32,7 @@
   },
   "devDependencies": {
     "@vitest/browser-playwright": "^4.0.18",
+    "playwright": "=1.58.2",
     "vitest": "^4.0.18"
   },
   "exports": {

blocksuite/affine/inlines/footnote/package.json

@@ -35,6 +35,7 @@
   },
   "devDependencies": {
     "@vitest/browser-playwright": "^4.0.18",
+    "playwright": "=1.58.2",
     "vitest": "^4.0.18"
   },
   "exports": {

blocksuite/framework/std/package.json

@@ -34,6 +34,7 @@
   },
   "devDependencies": {
     "@vitest/browser-playwright": "^4.0.18",
+    "playwright": "=1.58.2",
     "vitest": "^4.0.18"
   },
   "exports": {

blocksuite/integration-test/package.json

@@ -42,6 +42,7 @@
   "devDependencies": {
     "@vanilla-extract/vite-plugin": "^5.0.0",
     "@vitest/browser-playwright": "^4.0.18",
+    "playwright": "=1.58.2",
     "vite": "^7.2.7",
     "vite-plugin-istanbul": "^7.2.1",
     "vite-plugin-wasm": "^3.5.0",

deny.toml

@@ -0,0 +1,48 @@
+[graph]
+all-features = true
+exclude-dev = true
+targets = [
+  "x86_64-unknown-linux-gnu",
+  "aarch64-apple-darwin",
+  "x86_64-apple-darwin",
+  "x86_64-pc-windows-msvc",
+  "aarch64-linux-android",
+  "aarch64-apple-ios",
+  "aarch64-apple-ios-sim",
+]
+
+[licenses]
+allow = [
+  "0BSD",
+  "Apache-2.0",
+  "Apache-2.0 WITH LLVM-exception",
+  "BSD-2-Clause",
+  "BSD-3-Clause",
+  "BSL-1.0",
+  "CC0-1.0",
+  "CDLA-Permissive-2.0",
+  "ISC",
+  "MIT",
+  "MPL-2.0",
+  "Unicode-3.0",
+  "Unlicense",
+  "Zlib",
+]
+confidence-threshold = 0.93
+unused-allowed-license = "allow"
+version = 2
+
+  [[licenses.exceptions]]
+  allow = ["AGPL-3.0-only"]
+  crate = "llm_adapter"
+
+  [[licenses.exceptions]]
+  allow = ["AGPL-3.0-or-later"]
+  crate = "memory-indexer"
+
+  [[licenses.exceptions]]
+  allow = ["AGPL-3.0-or-later"]
+  crate = "path-ext"
+
+  [licenses.private]
+  ignore = true

packages/backend/native/Cargo.toml

@@ -2,6 +2,7 @@
 edition      = "2024"
 license-file = "LICENSE"
 name         = "affine_server_native"
+publish      = false
 version      = "1.0.0"
 
 [lib]

packages/common/infra/src/op/__tests__/client.spec.ts

@@ -10,6 +10,7 @@ interface TestOps extends OpSchema {
   add: [{ a: number; b: number }, number];
   bin: [Uint8Array, Uint8Array];
   sub: [Uint8Array, number];
+  init: [{ fastText?: boolean } | undefined, { ok: true }];
 }
 
 declare module 'vitest' {
@@ -84,6 +85,55 @@ describe('op client', () => {
     expect(data.byteLength).toBe(0);
   });
 
+  it('should send optional payload call with abort signal', async ctx => {
+    const abortController = new AbortController();
+    const result = ctx.producer.call(
+      'init',
+      { fastText: true },
+      abortController.signal
+    );
+
+    expect(ctx.postMessage.mock.calls[0][0]).toMatchInlineSnapshot(`
+      {
+        "id": "init:1",
+        "name": "init",
+        "payload": {
+          "fastText": true,
+        },
+        "type": "call",
+      }
+    `);
+
+    ctx.handlers.return({
+      type: 'return',
+      id: 'init:1',
+      data: { ok: true },
+    });
+
+    await expect(result).resolves.toEqual({ ok: true });
+  });
+
+  it('should send undefined payload for optional input call', async ctx => {
+    const result = ctx.producer.call('init', undefined);
+
+    expect(ctx.postMessage.mock.calls[0][0]).toMatchInlineSnapshot(`
+      {
+        "id": "init:1",
+        "name": "init",
+        "payload": undefined,
+        "type": "call",
+      }
+    `);
+
+    ctx.handlers.return({
+      type: 'return',
+      id: 'init:1',
+      data: { ok: true },
+    });
+
+    await expect(result).resolves.toEqual({ ok: true });
+  });
+
   it('should cancel call', async ctx => {
     const promise = ctx.producer.call('add', { a: 1, b: 2 });
 

packages/common/infra/src/op/__tests__/consumer.spec.ts

@@ -40,18 +40,14 @@ describe('op consumer', () => {
   it('should throw if no handler registered', async ctx => {
     ctx.handlers.call({ type: 'call', id: 'add:1', name: 'add', payload: {} });
     await vi.advanceTimersToNextTimerAsync();
-    expect(ctx.postMessage.mock.lastCall).toMatchInlineSnapshot(`
-      [
-        {
-          "error": {
-            "message": "Handler for operation [add] is not registered.",
-            "name": "Error",
-          },
-          "id": "add:1",
-          "type": "return",
-        },
-      ]
-    `);
+    expect(ctx.postMessage.mock.lastCall?.[0]).toMatchObject({
+      type: 'return',
+      id: 'add:1',
+      error: {
+        message: 'Handler for operation [add] is not registered.',
+        name: 'Error',
+      },
+    });
   });
 
   it('should handle call message', async ctx => {
@@ -73,6 +69,38 @@ describe('op consumer', () => {
     `);
   });
 
+  it('should serialize string errors with message', async ctx => {
+    ctx.consumer.register('any', () => {
+      throw 'worker panic';
+    });
+
+    ctx.handlers.call({ type: 'call', id: 'any:1', name: 'any', payload: {} });
+    await vi.advanceTimersToNextTimerAsync();
+
+    expect(ctx.postMessage.mock.calls[0][0]).toMatchObject({
+      type: 'return',
+      id: 'any:1',
+      error: {
+        name: 'Error',
+        message: 'worker panic',
+      },
+    });
+  });
+
+  it('should serialize plain object errors with fallback message', async ctx => {
+    ctx.consumer.register('any', () => {
+      throw { reason: 'panic', code: 'E_PANIC' };
+    });
+
+    ctx.handlers.call({ type: 'call', id: 'any:1', name: 'any', payload: {} });
+    await vi.advanceTimersToNextTimerAsync();
+
+    const message = ctx.postMessage.mock.calls[0][0]?.error?.message;
+    expect(typeof message).toBe('string');
+    expect(message).toContain('"reason":"panic"');
+    expect(message).toContain('"code":"E_PANIC"');
+  });
+
   it('should handle cancel message', async ctx => {
     ctx.consumer.register('add', ({ a, b }, { signal }) => {
       const { reject, resolve, promise } = Promise.withResolvers<number>();

packages/common/infra/src/op/consumer.ts

@@ -16,6 +16,96 @@ import {
 } from './message';
 import type { OpInput, OpNames, OpOutput, OpSchema } from './types';
 
+const SERIALIZABLE_ERROR_FIELDS = [
+  'name',
+  'message',
+  'code',
+  'type',
+  'status',
+  'data',
+  'stacktrace',
+] as const;
+
+type SerializableErrorShape = Partial<
+  Record<(typeof SERIALIZABLE_ERROR_FIELDS)[number], unknown>
+> & {
+  name?: string;
+  message?: string;
+};
+
+function getFallbackErrorMessage(error: unknown): string {
+  if (typeof error === 'string') {
+    return error;
+  }
+
+  if (error instanceof Error && error.message) {
+    return error.message;
+  }
+
+  if (
+    typeof error === 'number' ||
+    typeof error === 'boolean' ||
+    typeof error === 'bigint' ||
+    typeof error === 'symbol'
+  ) {
+    return String(error);
+  }
+
+  if (error === null || error === undefined) {
+    return 'Unknown error';
+  }
+
+  try {
+    const jsonMessage = JSON.stringify(error);
+    if (jsonMessage && jsonMessage !== '{}') {
+      return jsonMessage;
+    }
+  } catch {
+    return 'Unknown error';
+  }
+
+  return 'Unknown error';
+}
+
+function serializeError(error: unknown): Error {
+  const valueToPick =
+    error && typeof error === 'object'
+      ? error
+      : ({} as Record<string, unknown>);
+  const serialized = pick(
+    valueToPick,
+    SERIALIZABLE_ERROR_FIELDS
+  ) as SerializableErrorShape;
+
+  if (!serialized.message || typeof serialized.message !== 'string') {
+    serialized.message = getFallbackErrorMessage(error);
+  }
+
+  if (!serialized.name || typeof serialized.name !== 'string') {
+    if (error instanceof Error && error.name) {
+      serialized.name = error.name;
+    } else if (error && typeof error === 'object') {
+      const constructorName = error.constructor?.name;
+      serialized.name =
+        typeof constructorName === 'string' && constructorName.length > 0
+          ? constructorName
+          : 'Error';
+    } else {
+      serialized.name = 'Error';
+    }
+  }
+
+  if (
+    !serialized.stacktrace &&
+    error instanceof Error &&
+    typeof error.stack === 'string'
+  ) {
+    serialized.stacktrace = error.stack;
+  }
+
+  return serialized as Error;
+}
+
 interface OpCallContext {
   signal: AbortSignal;
 }
@@ -71,15 +161,7 @@ export class OpConsumer<Ops extends OpSchema> extends AutoMessageHandler {
           this.port.postMessage({
             type: 'return',
             id: msg.id,
-            error: pick(error, [
-              'name',
-              'message',
-              'code',
-              'type',
-              'status',
-              'data',
-              'stacktrace',
-            ]),
+            error: serializeError(error),
           } satisfies ReturnMessage);
         },
         complete: () => {
@@ -109,15 +191,7 @@ export class OpConsumer<Ops extends OpSchema> extends AutoMessageHandler {
           this.port.postMessage({
             type: 'error',
             id: msg.id,
-            error: pick(error, [
-              'name',
-              'message',
-              'code',
-              'type',
-              'status',
-              'data',
-              'stacktrace',
-            ]),
+            error: serializeError(error),
           } satisfies SubscriptionErrorMessage);
         },
         complete: () => {

packages/common/infra/src/op/types.ts

@@ -12,7 +12,16 @@ export interface OpSchema {
   [key: string]: [any, any?];
 }
 
-type RequiredInput<In> = In extends void ? [] : In extends never ? [] : [In];
+type IsAny<T> = 0 extends 1 & T ? true : false;
+
+type RequiredInput<In> =
+  IsAny<In> extends true
+    ? [In]
+    : [In] extends [never]
+      ? []
+      : [In] extends [void]
+        ? []
+        : [In];
 
 export type OpNames<T extends OpSchema> = ValuesOf<KeyToKey<T>>;
 export type OpInput<

packages/common/native/Cargo.toml

@@ -2,6 +2,7 @@
 edition      = "2024"
 license-file = "LICENSE"
 name         = "affine_common"
+publish      = false
 version      = "0.1.0"
 
 [features]

packages/frontend/apps/android/App/app/src/main/java/app/affine/pro/MainActivity.kt

@@ -19,6 +19,7 @@ import app.affine.pro.plugin.AFFiNEThemePlugin
 import app.affine.pro.plugin.AuthPlugin
 import app.affine.pro.plugin.HashCashPlugin
 import app.affine.pro.plugin.NbStorePlugin
+import app.affine.pro.plugin.PreviewPlugin
 import app.affine.pro.service.GraphQLService
 import app.affine.pro.service.SSEService
 import app.affine.pro.service.WebService
@@ -52,6 +53,7 @@ class MainActivity : BridgeActivity(), AIButtonPlugin.Callback, AFFiNEThemePlugi
                 AuthPlugin::class.java,
                 HashCashPlugin::class.java,
                 NbStorePlugin::class.java,
+                PreviewPlugin::class.java,
             )
         )
     }

packages/frontend/apps/android/App/app/src/main/java/app/affine/pro/ai/chat/ChatUiState.kt

@@ -1,8 +1,6 @@
 package app.affine.pro.ai.chat
 
-import com.affine.pro.graphql.GetCopilotHistoriesQuery
 import com.affine.pro.graphql.fragment.CopilotChatHistory
-import com.affine.pro.graphql.fragment.CopilotChatMessage
 import kotlinx.datetime.Clock
 import kotlinx.datetime.Instant
 
@@ -53,7 +51,7 @@ data class ChatMessage(
             createAt = Clock.System.now(),
         )
 
-        fun from(message: CopilotChatMessage) = ChatMessage(
+        fun from(message: CopilotChatHistory.Message) = ChatMessage(
             id = message.id,
             role = Role.fromValue(message.role),
             content = message.content,

packages/frontend/apps/android/App/app/src/main/java/app/affine/pro/plugin/PreviewPlugin.kt

@@ -0,0 +1,106 @@
+package app.affine.pro.plugin
+
+import android.net.Uri
+import com.getcapacitor.JSObject
+import com.getcapacitor.Plugin
+import com.getcapacitor.PluginCall
+import com.getcapacitor.PluginMethod
+import com.getcapacitor.annotation.CapacitorPlugin
+import kotlinx.coroutines.Dispatchers
+import timber.log.Timber
+import uniffi.affine_mobile_native.renderMermaidPreviewSvg
+import uniffi.affine_mobile_native.renderTypstPreviewSvg
+import java.io.File
+
+private fun JSObject.getOptionalString(key: String): String? {
+    return if (has(key) && !isNull(key)) getString(key) else null
+}
+
+private fun JSObject.getOptionalDouble(key: String): Double? {
+    return if (has(key) && !isNull(key)) getDouble(key) else null
+}
+
+private fun resolveLocalFontDir(fontUrl: String): String? {
+    val uri = Uri.parse(fontUrl)
+    val path = when {
+        uri.scheme == null -> {
+            val file = File(fontUrl)
+            if (!file.isAbsolute) {
+                return null
+            }
+            file.path
+        }
+        uri.scheme == "file" -> uri.path
+        else -> null
+    } ?: return null
+
+    val file = File(path)
+    val directory = if (file.isDirectory) file else file.parentFile ?: return null
+    return directory.absolutePath
+}
+
+private fun JSObject.resolveTypstFontDirs(): List<String>? {
+    if (!has("fontUrls") || isNull("fontUrls")) {
+        return null
+    }
+
+    val fontUrls = optJSONArray("fontUrls")
+        ?: throw IllegalArgumentException("Typst preview fontUrls must be an array of strings.")
+    val fontDirs = buildList(fontUrls.length()) {
+        repeat(fontUrls.length()) { index ->
+            val fontUrl = fontUrls.optString(index, null)
+                ?: throw IllegalArgumentException("Typst preview fontUrls must be strings.")
+            val fontDir = resolveLocalFontDir(fontUrl)
+                ?: throw IllegalArgumentException("Typst preview on mobile only supports local font file URLs or absolute font directories.")
+            add(fontDir)
+        }
+    }
+    return fontDirs.distinct()
+}
+
+@CapacitorPlugin(name = "Preview")
+class PreviewPlugin : Plugin() {
+
+    @PluginMethod
+    fun renderMermaidSvg(call: PluginCall) {
+        launch(Dispatchers.IO) {
+            try {
+                val code = call.getStringEnsure("code")
+                val options = call.getObject("options")
+                val svg = renderMermaidPreviewSvg(
+                    code = code,
+                    theme = options?.getOptionalString("theme"),
+                    fontFamily = options?.getOptionalString("fontFamily"),
+                    fontSize = options?.getOptionalDouble("fontSize"),
+                )
+                call.resolve(JSObject().apply {
+                    put("svg", svg)
+                })
+            } catch (e: Exception) {
+                Timber.e(e, "Failed to render Mermaid preview.")
+                call.reject("Failed to render Mermaid preview.", null, e)
+            }
+        }
+    }
+
+    @PluginMethod
+    fun renderTypstSvg(call: PluginCall) {
+        launch(Dispatchers.IO) {
+            try {
+                val code = call.getStringEnsure("code")
+                val options = call.getObject("options")
+                val svg = renderTypstPreviewSvg(
+                    code = code,
+                    fontDirs = options?.resolveTypstFontDirs(),
+                    cacheDir = context.cacheDir.absolutePath,
+                )
+                call.resolve(JSObject().apply {
+                    put("svg", svg)
+                })
+            } catch (e: Exception) {
+                Timber.e(e, "Failed to render Typst preview.")
+                call.reject("Failed to render Typst preview.", null, e)
+            }
+        }
+    }
+}

packages/frontend/apps/android/App/app/src/main/java/app/affine/pro/service/GraphQLService.kt

@@ -72,7 +72,7 @@ class GraphQLService @Inject constructor() {
     ).mapCatching { data ->
         data.currentUser?.copilot?.chats?.paginatedCopilotChats?.edges?.map { item -> item.node.copilotChatHistory }?.firstOrNull { history ->
           history.sessionId == sessionId
-        }?.messages?.map { msg -> msg.copilotChatMessage } ?: emptyList()
+        }?.messages ?: emptyList()
     }
 
     suspend fun getCopilotHistoryIds(

packages/frontend/apps/android/App/app/src/main/java/uniffi/affine_mobile_native/affine_mobile_native.kt

@@ -792,6 +792,10 @@ internal interface UniffiForeignFutureCompleteVoid : com.sun.jna.Callback {
 
 
 
+
+
+
+
 
 
 
@@ -816,6 +820,10 @@ internal interface IntegrityCheckingUniffiLib : Library {
 ): Short
 fun uniffi_affine_mobile_native_checksum_func_new_doc_storage_pool(
 ): Short
+fun uniffi_affine_mobile_native_checksum_func_render_mermaid_preview_svg(
+): Short
+fun uniffi_affine_mobile_native_checksum_func_render_typst_preview_svg(
+): Short
 fun uniffi_affine_mobile_native_checksum_method_docstoragepool_clear_clocks(
 ): Short
 fun uniffi_affine_mobile_native_checksum_method_docstoragepool_connect(
@@ -1017,6 +1025,10 @@ fun uniffi_affine_mobile_native_fn_func_hashcash_mint(`resource`: RustBuffer.ByV
 ): RustBuffer.ByValue
 fun uniffi_affine_mobile_native_fn_func_new_doc_storage_pool(uniffi_out_err: UniffiRustCallStatus, 
 ): Pointer
+fun uniffi_affine_mobile_native_fn_func_render_mermaid_preview_svg(`code`: RustBuffer.ByValue,`theme`: RustBuffer.ByValue,`fontFamily`: RustBuffer.ByValue,`fontSize`: RustBuffer.ByValue,uniffi_out_err: UniffiRustCallStatus, 
+): RustBuffer.ByValue
+fun uniffi_affine_mobile_native_fn_func_render_typst_preview_svg(`code`: RustBuffer.ByValue,`fontDirs`: RustBuffer.ByValue,`cacheDir`: RustBuffer.ByValue,uniffi_out_err: UniffiRustCallStatus, 
+): RustBuffer.ByValue
 fun ffi_affine_mobile_native_rustbuffer_alloc(`size`: Long,uniffi_out_err: UniffiRustCallStatus, 
 ): RustBuffer.ByValue
 fun ffi_affine_mobile_native_rustbuffer_from_bytes(`bytes`: ForeignBytes.ByValue,uniffi_out_err: UniffiRustCallStatus, 
@@ -1149,6 +1161,12 @@ private fun uniffiCheckApiChecksums(lib: IntegrityCheckingUniffiLib) {
     if (lib.uniffi_affine_mobile_native_checksum_func_new_doc_storage_pool() != 32882.toShort()) {
         throw RuntimeException("UniFFI API checksum mismatch: try cleaning and rebuilding your project")
     }
+    if (lib.uniffi_affine_mobile_native_checksum_func_render_mermaid_preview_svg() != 54334.toShort()) {
+        throw RuntimeException("UniFFI API checksum mismatch: try cleaning and rebuilding your project")
+    }
+    if (lib.uniffi_affine_mobile_native_checksum_func_render_typst_preview_svg() != 42796.toShort()) {
+        throw RuntimeException("UniFFI API checksum mismatch: try cleaning and rebuilding your project")
+    }
     if (lib.uniffi_affine_mobile_native_checksum_method_docstoragepool_clear_clocks() != 51151.toShort()) {
         throw RuntimeException("UniFFI API checksum mismatch: try cleaning and rebuilding your project")
     }
@@ -3178,6 +3196,38 @@ public object FfiConverterOptionalLong: FfiConverterRustBuffer<kotlin.Long?> {
 
 
 
+/**
+ * @suppress
+ */
+public object FfiConverterOptionalDouble: FfiConverterRustBuffer<kotlin.Double?> {
+    override fun read(buf: ByteBuffer): kotlin.Double? {
+        if (buf.get().toInt() == 0) {
+            return null
+        }
+        return FfiConverterDouble.read(buf)
+    }
+
+    override fun allocationSize(value: kotlin.Double?): ULong {
+        if (value == null) {
+            return 1UL
+        } else {
+            return 1UL + FfiConverterDouble.allocationSize(value)
+        }
+    }
+
+    override fun write(value: kotlin.Double?, buf: ByteBuffer) {
+        if (value == null) {
+            buf.put(0)
+        } else {
+            buf.put(1)
+            FfiConverterDouble.write(value, buf)
+        }
+    }
+}
+
+
+
+
 /**
  * @suppress
  */
@@ -3584,4 +3634,24 @@ public object FfiConverterSequenceTypeSearchHit: FfiConverterRustBuffer<List<Sea
     }
     
 
+    @Throws(UniffiException::class) fun `renderMermaidPreviewSvg`(`code`: kotlin.String, `theme`: kotlin.String?, `fontFamily`: kotlin.String?, `fontSize`: kotlin.Double?): kotlin.String {
+            return FfiConverterString.lift(
+    uniffiRustCallWithError(UniffiException) { _status ->
+    UniffiLib.INSTANCE.uniffi_affine_mobile_native_fn_func_render_mermaid_preview_svg(
+        FfiConverterString.lower(`code`),FfiConverterOptionalString.lower(`theme`),FfiConverterOptionalString.lower(`fontFamily`),FfiConverterOptionalDouble.lower(`fontSize`),_status)
+}
+    )
+    }
+    
+
+    @Throws(UniffiException::class) fun `renderTypstPreviewSvg`(`code`: kotlin.String, `fontDirs`: List<kotlin.String>?, `cacheDir`: kotlin.String?): kotlin.String {
+            return FfiConverterString.lift(
+    uniffiRustCallWithError(UniffiException) { _status ->
+    UniffiLib.INSTANCE.uniffi_affine_mobile_native_fn_func_render_typst_preview_svg(
+        FfiConverterString.lower(`code`),FfiConverterOptionalSequenceString.lower(`fontDirs`),FfiConverterOptionalString.lower(`cacheDir`),_status)
+}
+    )
+    }
+    
+
 

packages/frontend/apps/android/src/app.tsx

@@ -15,6 +15,7 @@ import {
   ServersService,
   ValidatorProvider,
 } from '@affine/core/modules/cloud';
+import { registerNativePreviewHandlers } from '@affine/core/modules/code-block-preview-renderer';
 import { DocsService } from '@affine/core/modules/doc';
 import { GlobalContextService } from '@affine/core/modules/global-context';
 import { I18nProvider } from '@affine/core/modules/i18n';
@@ -54,6 +55,7 @@ import { AIButton } from './plugins/ai-button';
 import { Auth } from './plugins/auth';
 import { HashCash } from './plugins/hashcash';
 import { NbStoreNativeDBApis } from './plugins/nbstore';
+import { Preview } from './plugins/preview';
 import { writeEndpointToken } from './proxy';
 
 const storeManagerClient = createStoreManagerClient();
@@ -85,6 +87,11 @@ framework.impl(NbstoreProvider, {
 });
 const frameworkProvider = framework.provider();
 
+registerNativePreviewHandlers({
+  renderMermaidSvg: request => Preview.renderMermaidSvg(request),
+  renderTypstSvg: request => Preview.renderTypstSvg(request),
+});
+
 framework.impl(PopupWindowProvider, {
   open: (url: string) => {
     InAppBrowser.open({

packages/frontend/apps/android/src/plugins/preview/definitions.ts

@@ -0,0 +1,16 @@
+export interface PreviewPlugin {
+  renderMermaidSvg(options: {
+    code: string;
+    options?: {
+      theme?: string;
+      fontFamily?: string;
+      fontSize?: number;
+    };
+  }): Promise<{ svg: string }>;
+  renderTypstSvg(options: {
+    code: string;
+    options?: {
+      fontUrls?: string[];
+    };
+  }): Promise<{ svg: string }>;
+}

packages/frontend/apps/android/src/plugins/preview/index.ts

@@ -0,0 +1,8 @@
+import { registerPlugin } from '@capacitor/core';
+
+import type { PreviewPlugin } from './definitions';
+
+const Preview = registerPlugin<PreviewPlugin>('Preview');
+
+export * from './definitions';
+export { Preview };

packages/frontend/apps/electron/src/helper/exposed.ts

@@ -1,5 +1,6 @@
 import { dialogHandlers } from './dialog';
 import { dbEventsV1, dbHandlersV1, nbstoreHandlers } from './nbstore';
+import { previewHandlers } from './preview';
 import { provideExposed } from './provide';
 import { workspaceEvents, workspaceHandlers } from './workspace';
 
@@ -8,6 +9,7 @@ export const handlers = {
   nbstore: nbstoreHandlers,
   workspace: workspaceHandlers,
   dialog: dialogHandlers,
+  preview: previewHandlers,
 };
 
 export const events = {

packages/frontend/apps/electron/src/helper/preview/index.ts

@@ -0,0 +1,69 @@
+import fs from 'node:fs';
+import path from 'node:path';
+
+import {
+  type MermaidRenderRequest,
+  type MermaidRenderResult,
+  renderMermaidSvg,
+  renderTypstSvg,
+  type TypstRenderRequest,
+  type TypstRenderResult,
+} from '@affine/native';
+
+const TYPST_FONT_DIRS_ENV = 'AFFINE_TYPST_FONT_DIRS';
+
+function parseTypstFontDirsFromEnv() {
+  const value = process.env[TYPST_FONT_DIRS_ENV];
+  if (!value) {
+    return [];
+  }
+
+  return value
+    .split(path.delimiter)
+    .map(dir => dir.trim())
+    .filter(Boolean);
+}
+
+function getTypstFontDirCandidates() {
+  const resourcesPath = process.resourcesPath ?? '';
+
+  return [
+    ...parseTypstFontDirsFromEnv(),
+    path.join(resourcesPath, 'fonts'),
+    path.join(resourcesPath, 'js', 'fonts'),
+    path.join(resourcesPath, 'app.asar.unpacked', 'fonts'),
+    path.join(resourcesPath, 'app.asar.unpacked', 'js', 'fonts'),
+  ];
+}
+
+function resolveTypstFontDirs() {
+  return Array.from(
+    new Set(getTypstFontDirCandidates().map(dir => path.resolve(dir)))
+  ).filter(dir => fs.statSync(dir, { throwIfNoEntry: false })?.isDirectory());
+}
+
+function withTypstFontDirs(
+  request: TypstRenderRequest,
+  fontDirs: string[]
+): TypstRenderRequest {
+  const nextOptions = request.options ? { ...request.options } : {};
+  if (!nextOptions.fontDirs?.length) {
+    nextOptions.fontDirs = fontDirs;
+  }
+  return { ...request, options: nextOptions };
+}
+
+const typstFontDirs = resolveTypstFontDirs();
+
+export const previewHandlers = {
+  renderMermaidSvg: async (
+    request: MermaidRenderRequest
+  ): Promise<MermaidRenderResult> => {
+    return renderMermaidSvg(request);
+  },
+  renderTypstSvg: async (
+    request: TypstRenderRequest
+  ): Promise<TypstRenderResult> => {
+    return renderTypstSvg(withTypstFontDirs(request, typstFontDirs));
+  },
+};

packages/frontend/apps/electron/test/helper/preview.spec.ts

@@ -0,0 +1,85 @@
+import path from 'node:path';
+
+import fs from 'fs-extra';
+import { afterEach, beforeEach, describe, expect, test, vi } from 'vitest';
+
+const { native } = vi.hoisted(() => ({
+  native: {
+    renderMermaidSvg: vi.fn(),
+    renderTypstSvg: vi.fn(),
+  },
+}));
+
+vi.mock('@affine/native', () => native);
+
+const tmpDir = path.join(__dirname, 'tmp');
+const typstFontDirA = path.join(tmpDir, 'fonts-a');
+const typstFontDirB = path.join(tmpDir, 'fonts-b');
+
+async function loadPreviewHandlers() {
+  vi.resetModules();
+  const module = await import('../../src/helper/preview');
+  return module.previewHandlers;
+}
+
+describe('helper preview handlers', () => {
+  beforeEach(async () => {
+    await fs.ensureDir(typstFontDirA);
+    await fs.ensureDir(typstFontDirB);
+    process.env.AFFINE_TYPST_FONT_DIRS = [
+      typstFontDirA,
+      typstFontDirB,
+      path.join(tmpDir, 'missing'),
+    ].join(path.delimiter);
+    native.renderMermaidSvg.mockReset();
+    native.renderTypstSvg.mockReset();
+    native.renderMermaidSvg.mockReturnValue({
+      svg: '<svg><text>mermaid</text></svg>',
+    });
+    native.renderTypstSvg.mockReturnValue({
+      svg: '<svg><text>typst</text></svg>',
+    });
+  });
+
+  afterEach(async () => {
+    delete process.env.AFFINE_TYPST_FONT_DIRS;
+    await fs.remove(tmpDir);
+  });
+
+  test('passes mermaid request to native renderer', async () => {
+    const previewHandlers = await loadPreviewHandlers();
+    const request = { code: 'flowchart TD; A-->B' };
+
+    await previewHandlers.renderMermaidSvg(request);
+
+    expect(native.renderMermaidSvg).toHaveBeenCalledWith(request);
+  });
+
+  test('injects resolved fontDirs into typst requests', async () => {
+    const previewHandlers = await loadPreviewHandlers();
+
+    await previewHandlers.renderTypstSvg({ code: '= hello' });
+
+    const [request] = native.renderTypstSvg.mock.calls[0];
+    expect(request.options?.fontDirs).toEqual(
+      expect.arrayContaining([
+        path.resolve(typstFontDirA),
+        path.resolve(typstFontDirB),
+      ])
+    );
+  });
+
+  test('keeps explicit typst fontDirs', async () => {
+    const previewHandlers = await loadPreviewHandlers();
+    const request = {
+      code: '= hello',
+      options: {
+        fontDirs: ['/tmp/custom-fonts'],
+      },
+    };
+
+    await previewHandlers.renderTypstSvg(request);
+
+    expect(native.renderTypstSvg).toHaveBeenCalledWith(request);
+  });
+});

packages/frontend/apps/ios/App/App.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -14,8 +14,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/Recouse/EventSource",
       "state" : {
-        "revision" : "7b2f4f585d3927876bd76eaede9fdff779eff102",
-        "version" : "0.1.5"
+        "revision" : "713f8c0a0270a80a968c007ddc0d6067e80a5393",
+        "version" : "0.1.7"
       }
     },
     {
@@ -41,8 +41,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/Lakr233/Litext",
       "state" : {
-        "revision" : "c7e83f2f580ce34a102ca9ba9d2bb24e507dccd9",
-        "version" : "0.5.6"
+        "revision" : "a2ed9b63ae623a20591effc72f9db7d04e41a64c",
+        "version" : "1.2.1"
       }
     },
     {
@@ -77,8 +77,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/RevenueCat/purchases-ios-spm.git",
       "state" : {
-        "revision" : "8f5df97653eb361a2097119479332afccf0aa816",
-        "version" : "5.58.0"
+        "revision" : "2913a336eb37dc06795cdbaa5b5de330b6707669",
+        "version" : "5.65.0"
       }
     },
     {

packages/frontend/apps/ios/App/App/AffineViewController.swift

@@ -34,6 +34,7 @@ class AFFiNEViewController: CAPBridgeViewController {
       NavigationGesturePlugin(),
       NbStorePlugin(),
       PayWallPlugin(associatedController: self),
+      PreviewPlugin(),
     ]
     plugins.forEach { bridge?.registerPluginInstance($0) }
   }

packages/frontend/apps/ios/App/App/Plugins/Preview/PreviewPlugin.swift

@@ -0,0 +1,119 @@
+import Foundation
+import Capacitor
+
+private func resolveLocalFontDir(from fontURL: String) -> String? {
+  let path: String
+  if fontURL.hasPrefix("file://") {
+    guard let url = URL(string: fontURL), url.isFileURL else {
+      return nil
+    }
+    path = url.path
+  } else {
+    let candidate = (fontURL as NSString).standardizingPath
+    guard candidate.hasPrefix("/") else {
+      return nil
+    }
+    path = candidate
+  }
+
+  var isDirectory: ObjCBool = false
+  if FileManager.default.fileExists(atPath: path, isDirectory: &isDirectory),
+     isDirectory.boolValue
+  {
+    return path
+  }
+
+  let directory = (path as NSString).deletingLastPathComponent
+  return directory.isEmpty ? nil : directory
+}
+
+private func resolveTypstFontDirs(from options: [AnyHashable: Any]?) throws -> [String]? {
+  guard let rawFontUrls = options?["fontUrls"] else {
+    return nil
+  }
+
+  guard let fontUrls = rawFontUrls as? [Any] else {
+    throw NSError(
+      domain: "PreviewPlugin",
+      code: 1,
+      userInfo: [
+        NSLocalizedDescriptionKey: "Typst preview fontUrls must be an array of strings."
+      ]
+    )
+  }
+
+  var seenFontDirs = Set<String>()
+  var orderedFontDirs = [String]()
+  orderedFontDirs.reserveCapacity(fontUrls.count)
+
+  for fontUrl in fontUrls {
+    guard let fontURL = fontUrl as? String else {
+      throw NSError(
+        domain: "PreviewPlugin",
+        code: 1,
+        userInfo: [
+          NSLocalizedDescriptionKey: "Typst preview fontUrls must be strings."
+        ]
+      )
+    }
+
+    guard let fontDir = resolveLocalFontDir(from: fontURL) else {
+      throw NSError(
+        domain: "PreviewPlugin",
+        code: 1,
+        userInfo: [
+          NSLocalizedDescriptionKey: "Typst preview on mobile only supports local font file URLs or absolute font directories."
+        ]
+      )
+    }
+
+    if seenFontDirs.insert(fontDir).inserted {
+      orderedFontDirs.append(fontDir)
+    }
+  }
+
+  return orderedFontDirs
+}
+
+@objc(PreviewPlugin)
+public class PreviewPlugin: CAPPlugin, CAPBridgedPlugin {
+  public let identifier = "PreviewPlugin"
+  public let jsName = "Preview"
+  public let pluginMethods: [CAPPluginMethod] = [
+    CAPPluginMethod(name: "renderMermaidSvg", returnType: CAPPluginReturnPromise),
+    CAPPluginMethod(name: "renderTypstSvg", returnType: CAPPluginReturnPromise),
+  ]
+
+  @objc func renderMermaidSvg(_ call: CAPPluginCall) {
+    DispatchQueue.global(qos: .userInitiated).async {
+      do {
+        let code = try call.getStringEnsure("code")
+        let options = call.getObject("options")
+        let svg = try renderMermaidPreviewSvg(
+          code: code,
+          theme: options?["theme"] as? String,
+          fontFamily: options?["fontFamily"] as? String,
+          fontSize: (options?["fontSize"] as? NSNumber)?.doubleValue
+        )
+        call.resolve(["svg": svg])
+      } catch {
+        call.reject("Failed to render Mermaid preview, \(error)", nil, error)
+      }
+    }
+  }
+
+  @objc func renderTypstSvg(_ call: CAPPluginCall) {
+    DispatchQueue.global(qos: .userInitiated).async {
+      do {
+        let code = try call.getStringEnsure("code")
+        let options = call.getObject("options")
+        let cacheDir = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first?.path
+        let fontDirs = try resolveTypstFontDirs(from: options)
+        let svg = try renderTypstPreviewSvg(code: code, fontDirs: fontDirs, cacheDir: cacheDir)
+        call.resolve(["svg": svg])
+      } catch {
+        call.reject("Failed to render Typst preview, \(error)", nil, error)
+      }
+    }
+  }
+}

packages/frontend/apps/ios/App/App/uniffi/affine_mobile_native.swift

@@ -2265,6 +2265,30 @@ fileprivate struct FfiConverterOptionInt64: FfiConverterRustBuffer {
     }
 }
 
+#if swift(>=5.8)
+@_documentation(visibility: private)
+#endif
+fileprivate struct FfiConverterOptionDouble: FfiConverterRustBuffer {
+    typealias SwiftType = Double?
+
+    public static func write(_ value: SwiftType, into buf: inout [UInt8]) {
+        guard let value = value else {
+            writeInt(&buf, Int8(0))
+            return
+        }
+        writeInt(&buf, Int8(1))
+        FfiConverterDouble.write(value, into: &buf)
+    }
+
+    public static func read(from buf: inout (data: Data, offset: Data.Index)) throws -> SwiftType {
+        switch try readInt(&buf) as Int8 {
+        case 0: return nil
+        case 1: return try FfiConverterDouble.read(from: &buf)
+        default: throw UniffiInternalError.unexpectedOptionalTag
+        }
+    }
+}
+
 #if swift(>=5.8)
 @_documentation(visibility: private)
 #endif
@@ -2644,6 +2668,25 @@ public func newDocStoragePool() -> DocStoragePool  {
     )
 })
 }
+public func renderMermaidPreviewSvg(code: String, theme: String?, fontFamily: String?, fontSize: Double?)throws  -> String  {
+    return try  FfiConverterString.lift(try rustCallWithError(FfiConverterTypeUniffiError_lift) {
+    uniffi_affine_mobile_native_fn_func_render_mermaid_preview_svg(
+        FfiConverterString.lower(code),
+        FfiConverterOptionString.lower(theme),
+        FfiConverterOptionString.lower(fontFamily),
+        FfiConverterOptionDouble.lower(fontSize),$0
+    )
+})
+}
+public func renderTypstPreviewSvg(code: String, fontDirs: [String]?, cacheDir: String?)throws  -> String  {
+    return try  FfiConverterString.lift(try rustCallWithError(FfiConverterTypeUniffiError_lift) {
+    uniffi_affine_mobile_native_fn_func_render_typst_preview_svg(
+        FfiConverterString.lower(code),
+        FfiConverterOptionSequenceString.lower(fontDirs),
+        FfiConverterOptionString.lower(cacheDir),$0
+    )
+})
+}
 
 private enum InitializationResult {
     case ok
@@ -2666,6 +2709,12 @@ private let initializationResult: InitializationResult = {
     if (uniffi_affine_mobile_native_checksum_func_new_doc_storage_pool() != 32882) {
         return InitializationResult.apiChecksumMismatch
     }
+    if (uniffi_affine_mobile_native_checksum_func_render_mermaid_preview_svg() != 54334) {
+        return InitializationResult.apiChecksumMismatch
+    }
+    if (uniffi_affine_mobile_native_checksum_func_render_typst_preview_svg() != 42796) {
+        return InitializationResult.apiChecksumMismatch
+    }
     if (uniffi_affine_mobile_native_checksum_method_docstoragepool_clear_clocks() != 51151) {
         return InitializationResult.apiChecksumMismatch
     }

packages/frontend/apps/ios/App/App/uniffi/affine_mobile_nativeFFI.h

@@ -450,6 +450,16 @@ RustBuffer uniffi_affine_mobile_native_fn_func_hashcash_mint(RustBuffer resource
 #define UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_FN_FUNC_NEW_DOC_STORAGE_POOL
 void*_Nonnull uniffi_affine_mobile_native_fn_func_new_doc_storage_pool(RustCallStatus *_Nonnull out_status
     
+);
+#endif
+#ifndef UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_FN_FUNC_RENDER_MERMAID_PREVIEW_SVG
+#define UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_FN_FUNC_RENDER_MERMAID_PREVIEW_SVG
+RustBuffer uniffi_affine_mobile_native_fn_func_render_mermaid_preview_svg(RustBuffer code, RustBuffer theme, RustBuffer font_family, RustBuffer font_size, RustCallStatus *_Nonnull out_status
+);
+#endif
+#ifndef UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_FN_FUNC_RENDER_TYPST_PREVIEW_SVG
+#define UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_FN_FUNC_RENDER_TYPST_PREVIEW_SVG
+RustBuffer uniffi_affine_mobile_native_fn_func_render_typst_preview_svg(RustBuffer code, RustBuffer font_dirs, RustBuffer cache_dir, RustCallStatus *_Nonnull out_status
 );
 #endif
 #ifndef UNIFFI_FFIDEF_FFI_AFFINE_MOBILE_NATIVE_RUSTBUFFER_ALLOC
@@ -742,6 +752,18 @@ uint16_t uniffi_affine_mobile_native_checksum_func_hashcash_mint(void
 #define UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_CHECKSUM_FUNC_NEW_DOC_STORAGE_POOL
 uint16_t uniffi_affine_mobile_native_checksum_func_new_doc_storage_pool(void
     
+);
+#endif
+#ifndef UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_CHECKSUM_FUNC_RENDER_MERMAID_PREVIEW_SVG
+#define UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_CHECKSUM_FUNC_RENDER_MERMAID_PREVIEW_SVG
+uint16_t uniffi_affine_mobile_native_checksum_func_render_mermaid_preview_svg(void
+    
+);
+#endif
+#ifndef UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_CHECKSUM_FUNC_RENDER_TYPST_PREVIEW_SVG
+#define UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_CHECKSUM_FUNC_RENDER_TYPST_PREVIEW_SVG
+uint16_t uniffi_affine_mobile_native_checksum_func_render_typst_preview_svg(void
+    
 );
 #endif
 #ifndef UNIFFI_FFIDEF_UNIFFI_AFFINE_MOBILE_NATIVE_CHECKSUM_METHOD_DOCSTORAGEPOOL_CLEAR_CLOCKS

packages/frontend/apps/ios/App/Packages/AffineGraphQL/Sources/Schema/CustomScalars/JSON.swift

@@ -8,4 +8,18 @@
 import ApolloAPI
 
 /// The `JSON` scalar type represents JSON values as specified by [ECMA-404](http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf).
-public typealias JSON = String
+public struct JSON: CustomScalarType, Hashable, ExpressibleByDictionaryLiteral {
+  public let value: JSONValue
+
+  public init(_jsonValue value: JSONValue) throws {
+    self.value = value
+  }
+
+  public init(dictionaryLiteral elements: (String, JSONValue)...) {
+    value = ApolloAPI.JSONObject(uniqueKeysWithValues: elements) as JSONValue
+  }
+
+  public var _jsonValue: JSONValue {
+    value
+  }
+}

packages/frontend/apps/ios/App/Packages/AffineGraphQL/Sources/Schema/CustomScalars/JSONObject.swift

@@ -8,4 +8,22 @@
 import ApolloAPI
 
 /// The `JSONObject` scalar type represents JSON objects as specified by [ECMA-404](http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf).
-public typealias JSONObject = String
+public struct JSONObject: CustomScalarType, Hashable, ExpressibleByDictionaryLiteral {
+  public let object: ApolloAPI.JSONObject
+
+  public init(_jsonValue value: JSONValue) throws {
+    object = try ApolloAPI.JSONObject(_jsonValue: value)
+  }
+
+  public init(_ object: ApolloAPI.JSONObject) {
+    self.object = object
+  }
+
+  public init(dictionaryLiteral elements: (String, JSONValue)...) {
+    object = ApolloAPI.JSONObject(uniqueKeysWithValues: elements)
+  }
+
+  public var _jsonValue: JSONValue {
+    object
+  }
+}

packages/frontend/apps/ios/App/Packages/Intelligents/Sources/Intelligents/ChatManager/ChatManager+Stream.swift

@@ -26,6 +26,7 @@ private extension InputBoxData {
 }
 
 public extension ChatManager {
+  @MainActor
   func startUserRequest(editorData: InputBoxData, sessionId: String) {
     append(sessionId: sessionId, UserMessageCellViewModel(
       id: .init(),
@@ -163,7 +164,7 @@ private extension ChatManager {
     assert(!Thread.isMainThread)
     print("[+] starting copilot response for session: \(sessionId)")
 
-    let messageParameters: [String: AnyHashable] = [
+    let messageParameters: AffineGraphQL.JSON = [
       // packages/frontend/core/src/blocksuite/ai/provider/setup-provider.tsx
       "docs": editorData.documentAttachments.map(\.documentID), // affine doc
       "files": [String](), // attachment in context, keep nil for now
@@ -193,18 +194,14 @@ private extension ChatManager {
       },
     ].flatMap(\.self)
     assert(uploadableAttachments.allSatisfy { !($0.data?.isEmpty ?? true) })
-    guard let input = try? CreateChatMessageInput(
+    let input = CreateChatMessageInput(
       attachments: [],
       blob: attachmentCount == 1 ? "" : .none,
       blobs: attachmentCount > 1 && attachmentCount != 0 ? .some([]) : .none,
       content: .some(contextSnippet.isEmpty ? editorData.text : "\(contextSnippet)\n\(editorData.text)"),
-      params: .some(AffineGraphQL.JSON(_jsonValue: messageParameters)),
+      params: .some(messageParameters),
       sessionId: sessionId
-    ) else {
-      report(sessionId, ChatError.unknownError)
-      assertionFailure() // very unlikely to happen
-      return
-    }
+    )
     let mutation = CreateCopilotMessageMutation(options: input)
     QLService.shared.client.upload(operation: mutation, files: uploadableAttachments) { result in
       print("[*] createCopilotMessage result: \(result)")
@@ -277,7 +274,7 @@ private extension ChatManager {
       let eventSource = EventSource()
       let dataTask = eventSource.dataTask(for: request)
       var document = ""
-      self.writeMarkdownContent(document + loadingIndicator, sessionId: sessionId, vmId: vmId)
+      await self.writeMarkdownContent(document + loadingIndicator, sessionId: sessionId, vmId: vmId)
       for await event in dataTask.events() {
         switch event {
         case .open:
@@ -287,7 +284,7 @@ private extension ChatManager {
         case let .event(event):
           guard let data = event.data else { continue }
           document += data
-          self.writeMarkdownContent(
+          await self.writeMarkdownContent(
             document + loadingIndicator,
             sessionId: sessionId,
             vmId: vmId
@@ -297,13 +294,13 @@ private extension ChatManager {
           print("[*] connection closed")
         }
       }
-      self.writeMarkdownContent(document, sessionId: sessionId, vmId: vmId)
+      await self.writeMarkdownContent(document, sessionId: sessionId, vmId: vmId)
       self.closeAll()
     }))
     self.closable.append(closable)
   }
 
-  private func writeMarkdownContent(
+  @MainActor private func writeMarkdownContent(
     _ document: String,
     sessionId: SessionID,
     vmId: UUID

packages/frontend/apps/ios/App/Packages/Intelligents/Sources/Intelligents/IntelligentContext/IntelligentContext+Markdown.swift

@@ -9,7 +9,7 @@ import Foundation
 import MarkdownView
 
 extension IntelligentContext {
-  func prepareMarkdownViewThemes() {
+  @MainActor func prepareMarkdownViewThemes() {
     MarkdownTheme.default.colors.body = .affineTextPrimary
     MarkdownTheme.default.colors.highlight = .affineTextLink
   }

packages/frontend/apps/ios/App/Packages/Intelligents/Sources/Intelligents/Interface/View/ChatCell/ViewModel/CCVM+Assistant.swift

@@ -40,7 +40,7 @@ struct AssistantMessageCellViewModel: ChatCellViewModel {
 
   var preprocessedContent: MarkdownTextView.PreprocessedContent
 
-  init(
+  @MainActor init(
     id: UUID,
     content: String,
     timestamp: Date,

packages/frontend/apps/ios/App/Podfile.lock

@@ -45,13 +45,13 @@ EXTERNAL SOURCES:
     :path: "../../../../../node_modules/capacitor-plugin-app-tracking-transparency"
 
 SPEC CHECKSUMS:
-  Capacitor: 12914e6f1b7835e161a74ebd19cb361efa37a7dd
-  CapacitorApp: 63b237168fc869e758481dba283315a85743ee78
-  CapacitorBrowser: b98aa3db018a2ce4c68242d27e596c344f3b81b3
+  Capacitor: a5bf59e09f9dd82694fdcca4d107b4d215ac470f
+  CapacitorApp: 3ddbd30ac18c321531c3da5e707b60873d89dd60
+  CapacitorBrowser: 66aa8ff09cdca2a327ce464b113b470e6f667753
   CapacitorCordova: 31bbe4466000c6b86d9b7f1181ee286cff0205aa
-  CapacitorHaptics: ce15be8f287fa2c61c7d2d9e958885b90cf0bebc
-  CapacitorKeyboard: 5660c760113bfa48962817a785879373cf5339c3
-  CapacitorPluginAppTrackingTransparency: 92ae9c1cfb5cf477753db9269689332a686f675a
+  CapacitorHaptics: d17da7dd984cae34111b3f097ccd3e21f9feec62
+  CapacitorKeyboard: 45cae3956a6f4fb1753f9a4df3e884aeaed8fe82
+  CapacitorPluginAppTrackingTransparency: 2a2792623a5a72795f2e8f9ab3f1147573732fd8
   CryptoSwift: 967f37cea5a3294d9cce358f78861652155be483
 
 PODFILE CHECKSUM: 2c1e4be82121f2d9724ecf7e31dd14e165aeb082

packages/frontend/apps/ios/src/app.tsx

@@ -17,6 +17,7 @@ import {
   SubscriptionService,
   ValidatorProvider,
 } from '@affine/core/modules/cloud';
+import { registerNativePreviewHandlers } from '@affine/core/modules/code-block-preview-renderer';
 import { DocsService } from '@affine/core/modules/doc';
 import { FeatureFlagService } from '@affine/core/modules/feature-flag';
 import { GlobalContextService } from '@affine/core/modules/global-context';
@@ -71,6 +72,7 @@ import { Auth } from './plugins/auth';
 import { Hashcash } from './plugins/hashcash';
 import { NbStoreNativeDBApis } from './plugins/nbstore';
 import { PayWall } from './plugins/paywall';
+import { Preview } from './plugins/preview';
 import { writeEndpointToken } from './proxy';
 import { enableNavigationGesture$ } from './web-navigation-control';
 
@@ -215,6 +217,11 @@ framework.impl(NativePaywallProvider, {
 
 const frameworkProvider = framework.provider();
 
+registerNativePreviewHandlers({
+  renderMermaidSvg: request => Preview.renderMermaidSvg(request),
+  renderTypstSvg: request => Preview.renderTypstSvg(request),
+});
+
 // ------ some apis for native ------
 (window as any).getCurrentServerBaseUrl = () => {
   const globalContextService = frameworkProvider.get(GlobalContextService);

packages/frontend/apps/ios/src/plugins/preview/definitions.ts

@@ -0,0 +1,16 @@
+export interface PreviewPlugin {
+  renderMermaidSvg(options: {
+    code: string;
+    options?: {
+      theme?: string;
+      fontFamily?: string;
+      fontSize?: number;
+    };
+  }): Promise<{ svg: string }>;
+  renderTypstSvg(options: {
+    code: string;
+    options?: {
+      fontUrls?: string[];
+    };
+  }): Promise<{ svg: string }>;
+}

packages/frontend/apps/ios/src/plugins/preview/index.ts

@@ -0,0 +1,8 @@
+import { registerPlugin } from '@capacitor/core';
+
+import type { PreviewPlugin } from './definitions';
+
+const Preview = registerPlugin<PreviewPlugin>('Preview');
+
+export * from './definitions';
+export { Preview };

packages/frontend/core/package.json

@@ -47,6 +47,7 @@
     "@radix-ui/react-toolbar": "^1.1.1",
     "@sentry/react": "^10.40.0",
     "@toeverything/infra": "workspace:*",
+    "@toeverything/mermaid-wasm": "^0.1.0",
     "@toeverything/pdf-viewer": "^0.1.1",
     "@toeverything/theme": "^1.1.23",
     "@vanilla-extract/dynamic": "^2.1.2",
@@ -57,6 +58,7 @@
     "cmdk": "^1.0.4",
     "core-js": "^3.39.0",
     "dayjs": "^1.11.13",
+    "dompurify": "^3.3.0",
     "eventemitter2": "^6.4.9",
     "file-type": "^21.0.0",
     "filesize": "^10.1.6",
@@ -76,7 +78,7 @@
     "lit": "^3.2.1",
     "lodash-es": "^4.17.23",
     "lottie-react": "^2.4.0",
-    "mermaid": "^11.12.2",
+    "mermaid": "^11.13.0",
     "mp4-muxer": "^5.2.2",
     "nanoid": "^5.1.6",
     "next-themes": "^0.4.4",

packages/frontend/core/src/blocksuite/view-extensions/code-block-preview/mermaid-preview.ts

@@ -1,3 +1,4 @@
+import { renderMermaidSvg } from '@affine/core/modules/code-block-preview-renderer/bridge';
 import { CodeBlockPreviewExtension } from '@blocksuite/affine/blocks/code';
 import { SignalWatcher, WithDisposable } from '@blocksuite/affine/global/lit';
 import type { CodeBlockModel } from '@blocksuite/affine/model';
@@ -7,7 +8,6 @@ import { css, html, nothing, type PropertyValues } from 'lit';
 import { property, query, state } from 'lit/decorators.js';
 import { choose } from 'lit/directives/choose.js';
 import { styleMap } from 'lit/directives/style-map.js';
-import type { Mermaid } from 'mermaid';
 
 export const CodeBlockMermaidPreview = CodeBlockPreviewExtension(
   'mermaid',
@@ -154,7 +154,6 @@ export class MermaidPreview extends SignalWatcher(
   @query('.mermaid-preview-container')
   accessor container!: HTMLDivElement;
 
-  private mermaid: Mermaid | null = null;
   private retryCount = 0;
   private readonly maxRetries = 3;
   private renderTimeout: ReturnType<typeof setTimeout> | null = null;
@@ -169,9 +168,6 @@ export class MermaidPreview extends SignalWatcher(
   private lastMouseY = 0;
 
   override firstUpdated(_changedProperties: PropertyValues): void {
-    this._loadMermaid().catch(error => {
-      console.error('Failed to load mermaid in firstUpdated:', error);
-    });
     this._scheduleRender();
     this._setupEventListeners();
 
@@ -271,7 +267,8 @@ export class MermaidPreview extends SignalWatcher(
     event.preventDefault();
 
     const delta = event.deltaY > 0 ? 0.9 : 1.1;
-    const newScale = Math.max(0.1, Math.min(5, this.scale * delta));
+    const previousScale = this.scale;
+    const newScale = Math.max(0.1, Math.min(5, previousScale * delta));
 
     // calculate mouse position relative to container
     const rect = this.container.getBoundingClientRect();
@@ -284,8 +281,8 @@ export class MermaidPreview extends SignalWatcher(
 
     // update transform
     this.scale = newScale;
-    this.translateX = mouseX - scaleCenterX * (newScale / this.scale);
-    this.translateY = mouseY - scaleCenterY * (newScale / this.scale);
+    this.translateX = mouseX - scaleCenterX * (newScale / previousScale);
+    this.translateY = mouseY - scaleCenterY * (newScale / previousScale);
 
     this._updateTransform();
   };
@@ -309,44 +306,6 @@ export class MermaidPreview extends SignalWatcher(
     );
   }
 
-  private async _loadMermaid() {
-    try {
-      // dynamic load mermaid
-      const mermaidModule = await import('mermaid');
-      this.mermaid = mermaidModule.default;
-
-      // initialize mermaid
-      this.mermaid.initialize({
-        startOnLoad: false,
-        theme: 'default',
-        securityLevel: 'strict',
-        fontFamily: 'IBM Plex Mono',
-        flowchart: {
-          useMaxWidth: true,
-          htmlLabels: true,
-        },
-        sequence: {
-          useMaxWidth: true,
-        },
-        gantt: {
-          useMaxWidth: true,
-        },
-        pie: {
-          useMaxWidth: true,
-        },
-        journey: {
-          useMaxWidth: true,
-        },
-        gitGraph: {
-          useMaxWidth: true,
-        },
-      });
-    } catch (error) {
-      console.error('Failed to load mermaid:', error);
-      this.state = 'error';
-    }
-  }
-
   private async _render() {
     // prevent duplicate rendering
     if (this.isRendering) {
@@ -356,28 +315,25 @@ export class MermaidPreview extends SignalWatcher(
     this.isRendering = true;
     this.state = 'loading';
 
-    if (!this.normalizedMermaidCode) {
+    const code = this.normalizedMermaidCode?.trim();
+
+    if (!code) {
+      this.svgContent = '';
       this.state = 'fallback';
       this.isRendering = false;
       return;
     }
 
-    if (!this.mermaid) {
-      await this._loadMermaid();
-    }
-    if (!this.mermaid) {
-      return;
-    }
-
     try {
-      // generate unique ID
-      const diagramId = `mermaid-diagram-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
-
-      // generate SVG
-      const { svg } = await this.mermaid.render(
-        diagramId,
-        this.normalizedMermaidCode
-      );
+      const { svg } = await renderMermaidSvg({
+        code,
+        options: {
+          fastText: true,
+          svgOnly: true,
+          theme: 'default',
+          fontFamily: 'IBM Plex Mono',
+        },
+      });
 
       // update SVG content
       this.svgContent = svg;

packages/frontend/core/src/blocksuite/view-extensions/code-block-preview/typst-preview.ts

@@ -1,3 +1,4 @@
+import { renderTypstSvg } from '@affine/core/modules/code-block-preview-renderer/bridge';
 import { CodeBlockPreviewExtension } from '@blocksuite/affine/blocks/code';
 import { SignalWatcher, WithDisposable } from '@blocksuite/affine/global/lit';
 import type { CodeBlockModel } from '@blocksuite/affine/model';
@@ -8,8 +9,6 @@ import { property, query, state } from 'lit/decorators.js';
 import { choose } from 'lit/directives/choose.js';
 import { styleMap } from 'lit/directives/style-map.js';
 
-import { ensureTypstReady, getTypst } from './typst';
-
 const RENDER_DEBOUNCE_MS = 200;
 
 export const CodeBlockTypstPreview = CodeBlockPreviewExtension(
@@ -378,9 +377,7 @@ ${this.errorMessage}</pre
     }
 
     try {
-      await ensureTypstReady();
-      const typst = await getTypst();
-      const svg = await typst.svg({ mainContent: code });
+      const { svg } = await renderTypstSvg({ code });
       this.svgContent = svg;
       this.state = 'finish';
       this._resetView();

packages/frontend/core/src/blocksuite/view-extensions/code-block-preview/typst.ts

@@ -1,57 +0,0 @@
-import { $typst, type BeforeBuildFn, loadFonts } from '@myriaddreamin/typst.ts';
-
-const FONT_CDN_URLS = [
-  'https://cdn.affine.pro/fonts/Inter-Regular.woff',
-  'https://cdn.affine.pro/fonts/Inter-SemiBold.woff',
-  'https://cdn.affine.pro/fonts/Inter-Italic.woff',
-  'https://cdn.affine.pro/fonts/Inter-SemiBoldItalic.woff',
-  'https://cdn.affine.pro/fonts/SarasaGothicCL-Regular.ttf',
-] as const;
-
-const getBeforeBuildHooks = (): BeforeBuildFn[] => [
-  loadFonts([...FONT_CDN_URLS]),
-];
-
-const compilerWasmUrl = new URL(
-  '@myriaddreamin/typst-ts-web-compiler/pkg/typst_ts_web_compiler_bg.wasm',
-  import.meta.url
-).toString();
-
-const rendererWasmUrl = new URL(
-  '@myriaddreamin/typst-ts-renderer/pkg/typst_ts_renderer_bg.wasm',
-  import.meta.url
-).toString();
-
-let typstInitPromise: Promise<void> | null = null;
-
-export async function ensureTypstReady() {
-  if (typstInitPromise) {
-    return typstInitPromise;
-  }
-
-  typstInitPromise = Promise.resolve()
-    .then(() => {
-      $typst.setCompilerInitOptions({
-        beforeBuild: getBeforeBuildHooks(),
-        getModule: () => compilerWasmUrl,
-      });
-
-      $typst.setRendererInitOptions({
-        beforeBuild: getBeforeBuildHooks(),
-        getModule: () => rendererWasmUrl,
-      });
-    })
-    .catch(error => {
-      typstInitPromise = null;
-      throw error;
-    });
-
-  return typstInitPromise;
-}
-
-export async function getTypst() {
-  await ensureTypstReady();
-  return $typst;
-}
-
-export const TYPST_FONT_URLS = FONT_CDN_URLS;

packages/frontend/core/src/modules/code-block-preview-renderer/bridge.spec.ts

@@ -0,0 +1,74 @@
+import { beforeEach, describe, expect, test, vi } from 'vitest';
+
+const { mermaidRender, typstRender } = vi.hoisted(() => ({
+  mermaidRender: vi.fn(),
+  typstRender: vi.fn(),
+}));
+
+const { domPurifySanitize } = vi.hoisted(() => ({
+  domPurifySanitize: vi.fn((value: unknown) => {
+    if (typeof value !== 'string') {
+      return '';
+    }
+    return value.replace(/<script[\s\S]*?<\/script>/gi, '');
+  }),
+}));
+
+vi.mock(
+  '@affine/core/modules/code-block-preview-renderer/platform-backend',
+  () => ({
+    renderMermaidSvgBackend: mermaidRender,
+    renderTypstSvgBackend: typstRender,
+  })
+);
+
+vi.mock('dompurify', () => ({
+  default: {
+    sanitize: domPurifySanitize,
+  },
+}));
+
+import { renderMermaidSvg, renderTypstSvg } from './bridge';
+
+describe('preview render bridge', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    domPurifySanitize.mockImplementation((value: unknown) => {
+      if (typeof value !== 'string') {
+        return '';
+      }
+      return value.replace(/<script[\s\S]*?<\/script>/gi, '');
+    });
+  });
+
+  test('uses worker renderers and only sanitizes mermaid output', async () => {
+    mermaidRender.mockResolvedValue({
+      svg: '<svg><script>alert(1)</script><text>mermaid</text></svg>',
+    });
+    typstRender.mockResolvedValue({
+      svg: '<div><script>window.__xss__=1</script><svg><text>typst</text></svg></div>',
+    });
+
+    const mermaid = await renderMermaidSvg({ code: 'flowchart TD;A-->B' });
+    const typst = await renderTypstSvg({ code: '= Title' });
+
+    expect(mermaidRender).toHaveBeenCalledTimes(1);
+    expect(typstRender).toHaveBeenCalledTimes(1);
+    expect(mermaid.svg).toContain('<svg');
+    expect(mermaid.svg).toContain('mermaid');
+    expect(mermaid.svg).not.toContain('<script');
+    expect(typst.svg).toBe(
+      '<div><script>window.__xss__=1</script><svg><text>typst</text></svg></div>'
+    );
+  });
+
+  test('throws when sanitized svg is empty', async () => {
+    mermaidRender.mockResolvedValue({
+      svg: '<div><text>invalid</text></div>',
+    });
+
+    await expect(
+      renderMermaidSvg({ code: 'flowchart TD;A-->B' })
+    ).rejects.toThrow('Preview renderer returned invalid SVG.');
+  });
+});

packages/frontend/core/src/modules/code-block-preview-renderer/bridge.ts

@@ -0,0 +1,68 @@
+import {
+  renderMermaidSvgBackend,
+  renderTypstSvgBackend,
+} from '@affine/core/modules/code-block-preview-renderer/platform-backend';
+import type {
+  MermaidRenderRequest,
+  MermaidRenderResult,
+} from '@affine/core/modules/mermaid/renderer';
+import type {
+  TypstRenderRequest,
+  TypstRenderResult,
+} from '@affine/core/modules/typst/renderer';
+import DOMPurify from 'dompurify';
+
+function removeForeignObject(root: ParentNode) {
+  root
+    .querySelectorAll('foreignObject, foreignobject')
+    .forEach(element => element.remove());
+}
+
+export function sanitizeSvg(svg: string): string {
+  if (
+    typeof DOMParser === 'undefined' ||
+    typeof XMLSerializer === 'undefined'
+  ) {
+    const sanitized = DOMPurify.sanitize(svg, { USE_PROFILES: { svg: true } });
+    if (typeof sanitized !== 'string' || !/^\s*<svg[\s>]/i.test(sanitized)) {
+      return '';
+    }
+    return sanitized.trim();
+  }
+
+  const parser = new DOMParser();
+  const parsed = parser.parseFromString(svg, 'image/svg+xml');
+  const root = parsed.documentElement;
+  if (!root || root.tagName.toLowerCase() !== 'svg') return '';
+
+  const sanitized = DOMPurify.sanitize(root, { USE_PROFILES: { svg: true } });
+  if (typeof sanitized !== 'string') return '';
+
+  const sanitizedDoc = parser.parseFromString(sanitized, 'image/svg+xml');
+  const sanitizedRoot = sanitizedDoc.documentElement;
+  if (!sanitizedRoot || sanitizedRoot.tagName.toLowerCase() !== 'svg')
+    return '';
+
+  removeForeignObject(sanitizedRoot);
+  return new XMLSerializer().serializeToString(sanitizedRoot).trim();
+}
+
+export async function renderMermaidSvg(
+  request: MermaidRenderRequest
+): Promise<MermaidRenderResult> {
+  const rendered = await renderMermaidSvgBackend(request);
+
+  const sanitizedSvg = sanitizeSvg(rendered.svg);
+  if (!sanitizedSvg) {
+    throw new Error('Preview renderer returned invalid SVG.');
+  }
+  return { svg: sanitizedSvg };
+}
+
+export async function renderTypstSvg(
+  request: TypstRenderRequest
+): Promise<TypstRenderResult> {
+  const rendered = await renderTypstSvgBackend(request);
+
+  return { svg: rendered.svg };
+}

packages/frontend/core/src/modules/code-block-preview-renderer/classic-mermaid.spec.ts

@@ -0,0 +1,68 @@
+import { beforeEach, describe, expect, test, vi } from 'vitest';
+
+const { initialize, render } = vi.hoisted(() => ({
+  initialize: vi.fn(),
+  render: vi.fn(),
+}));
+
+vi.mock('mermaid', () => ({
+  default: {
+    initialize,
+    render,
+  },
+}));
+
+import { renderClassicMermaidSvg } from './classic-mermaid';
+
+describe('renderClassicMermaidSvg', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  test('serializes initialize and render across concurrent calls', async () => {
+    const events: string[] = [];
+    let releaseFirstRender!: () => void;
+
+    initialize.mockImplementation(config => {
+      events.push(`init:${config.theme}`);
+    });
+    render
+      .mockImplementationOnce(async () => {
+        events.push('render:first:start');
+        await new Promise<void>(resolve => {
+          releaseFirstRender = resolve;
+        });
+        events.push('render:first:end');
+        return { svg: '<svg>first</svg>' };
+      })
+      .mockImplementationOnce(async () => {
+        events.push('render:second:start');
+        return { svg: '<svg>second</svg>' };
+      });
+
+    const first = renderClassicMermaidSvg({
+      code: 'flowchart TD;A-->B',
+      options: { theme: 'default' },
+    });
+    const second = renderClassicMermaidSvg({
+      code: 'flowchart TD;B-->C',
+      options: { theme: 'modern' },
+    });
+
+    await vi.waitFor(() => {
+      expect(events).toEqual(['init:default', 'render:first:start']);
+    });
+
+    releaseFirstRender();
+
+    await expect(first).resolves.toEqual({ svg: '<svg>first</svg>' });
+    await expect(second).resolves.toEqual({ svg: '<svg>second</svg>' });
+    expect(events).toEqual([
+      'init:default',
+      'render:first:start',
+      'render:first:end',
+      'init:base',
+      'render:second:start',
+    ]);
+  });
+});

packages/frontend/core/src/modules/code-block-preview-renderer/classic-mermaid.ts

@@ -0,0 +1,62 @@
+import type { Mermaid } from 'mermaid';
+
+import type {
+  MermaidRenderOptions,
+  MermaidRenderRequest,
+  MermaidRenderResult,
+  MermaidRenderTheme,
+} from '../mermaid/renderer';
+
+let mermaidPromise: Promise<Mermaid> | null = null;
+let mermaidRenderQueue: Promise<void> = Promise.resolve();
+
+function toTheme(theme: MermaidRenderTheme | undefined) {
+  return theme === 'modern' ? ('base' as const) : ('default' as const);
+}
+
+function createClassicMermaidConfig(options?: MermaidRenderOptions) {
+  return {
+    startOnLoad: false,
+    theme: toTheme(options?.theme),
+    securityLevel: 'strict' as const,
+    fontFamily: options?.fontFamily ?? 'IBM Plex Mono',
+    flowchart: { useMaxWidth: true, htmlLabels: true },
+    sequence: { useMaxWidth: true },
+    gantt: { useMaxWidth: true },
+    pie: { useMaxWidth: true },
+    journey: { useMaxWidth: true },
+    gitGraph: { useMaxWidth: true },
+  };
+}
+
+async function loadMermaid() {
+  if (!mermaidPromise) {
+    mermaidPromise = import('mermaid').then(module => module.default);
+  }
+  return mermaidPromise;
+}
+
+function createDiagramId() {
+  return `mermaid-diagram-${Date.now()}-${Math.random().toString(36).slice(2)}`;
+}
+
+function enqueueClassicMermaidRender<T>(task: () => Promise<T>): Promise<T> {
+  const run = mermaidRenderQueue.then(task, task);
+  mermaidRenderQueue = run.then(
+    () => undefined,
+    () => undefined
+  );
+  return run;
+}
+
+export async function renderClassicMermaidSvg(
+  request: MermaidRenderRequest
+): Promise<MermaidRenderResult> {
+  return enqueueClassicMermaidRender(async () => {
+    const mermaid = await loadMermaid();
+    mermaid.initialize(createClassicMermaidConfig(request.options));
+
+    const { svg } = await mermaid.render(createDiagramId(), request.code);
+    return { svg };
+  });
+}

packages/frontend/core/src/modules/code-block-preview-renderer/index.ts

@@ -0,0 +1,14 @@
+import type { Framework } from '@toeverything/infra';
+
+import { FeatureFlagService } from '../feature-flag';
+import { PreviewRendererFeatureSyncService } from './services/preview-renderer-feature-sync';
+
+export { renderMermaidSvg, renderTypstSvg, sanitizeSvg } from './bridge';
+export {
+  registerNativePreviewHandlers,
+  setMermaidWasmNativeRendererEnabled,
+} from './runtime-config';
+
+export function configureCodeBlockPreviewRendererModule(framework: Framework) {
+  framework.service(PreviewRendererFeatureSyncService, [FeatureFlagService]);
+}

packages/frontend/core/src/modules/code-block-preview-renderer/platform-backend.desktop.ts

@@ -0,0 +1,52 @@
+import { apis } from '@affine/electron-api';
+
+import { renderClassicMermaidSvg } from './classic-mermaid';
+import { isMermaidWasmNativeRendererEnabled } from './runtime-config';
+import type { PreviewRenderRequestMap, PreviewRenderResultMap } from './types';
+
+type DesktopPreviewHandlers = {
+  renderMermaidSvg?: (
+    request: PreviewRenderRequestMap['mermaid']
+  ) => Promise<PreviewRenderResultMap['mermaid']>;
+  renderTypstSvg?: (
+    request: PreviewRenderRequestMap['typst']
+  ) => Promise<PreviewRenderResultMap['typst']>;
+};
+
+type DesktopPreviewApis = {
+  preview?: DesktopPreviewHandlers;
+};
+
+function getDesktopPreviewHandlers() {
+  const previewApis = apis as unknown as DesktopPreviewApis;
+  return previewApis.preview ?? null;
+}
+
+function getRequiredDesktopHandler<Name extends keyof DesktopPreviewHandlers>(
+  name: Name
+): NonNullable<DesktopPreviewHandlers[Name]> {
+  const handlers = getDesktopPreviewHandlers();
+  const handler = handlers?.[name];
+  if (!handler) {
+    throw new Error(
+      `Electron preview handler "${String(name)}" is unavailable.`
+    );
+  }
+  return handler as NonNullable<DesktopPreviewHandlers[Name]>;
+}
+
+export async function renderMermaidSvgBackend(
+  request: PreviewRenderRequestMap['mermaid']
+): Promise<PreviewRenderResultMap['mermaid']> {
+  if (!isMermaidWasmNativeRendererEnabled()) {
+    return renderClassicMermaidSvg(request);
+  }
+
+  return getRequiredDesktopHandler('renderMermaidSvg')(request);
+}
+
+export async function renderTypstSvgBackend(
+  request: PreviewRenderRequestMap['typst']
+): Promise<PreviewRenderResultMap['typst']> {
+  return getRequiredDesktopHandler('renderTypstSvg')(request);
+}

packages/frontend/core/src/modules/code-block-preview-renderer/platform-backend.mobile.ts

@@ -0,0 +1,24 @@
+import { getNativePreviewHandlers } from './runtime-config';
+import type { PreviewRenderRequestMap, PreviewRenderResultMap } from './types';
+
+function getRequiredNativeHandler<
+  Name extends keyof NonNullable<ReturnType<typeof getNativePreviewHandlers>>,
+>(name: Name) {
+  const handler = getNativePreviewHandlers()?.[name];
+  if (!handler) {
+    throw new Error(`Mobile preview handler "${String(name)}" is unavailable.`);
+  }
+  return handler;
+}
+
+export async function renderMermaidSvgBackend(
+  request: PreviewRenderRequestMap['mermaid']
+): Promise<PreviewRenderResultMap['mermaid']> {
+  return getRequiredNativeHandler('renderMermaidSvg')(request);
+}
+
+export async function renderTypstSvgBackend(
+  request: PreviewRenderRequestMap['typst']
+): Promise<PreviewRenderResultMap['typst']> {
+  return getRequiredNativeHandler('renderTypstSvg')(request);
+}

packages/frontend/core/src/modules/code-block-preview-renderer/platform-backend.ts

@@ -0,0 +1,22 @@
+import { getMermaidRenderer } from '@affine/core/modules/mermaid/renderer';
+import { getTypstRenderer } from '@affine/core/modules/typst/renderer';
+
+import { renderClassicMermaidSvg } from './classic-mermaid';
+import { isMermaidWasmNativeRendererEnabled } from './runtime-config';
+import type { PreviewRenderRequestMap, PreviewRenderResultMap } from './types';
+
+export async function renderMermaidSvgBackend(
+  request: PreviewRenderRequestMap['mermaid']
+): Promise<PreviewRenderResultMap['mermaid']> {
+  if (!isMermaidWasmNativeRendererEnabled()) {
+    return renderClassicMermaidSvg(request);
+  }
+
+  return getMermaidRenderer().render(request);
+}
+
+export async function renderTypstSvgBackend(
+  request: PreviewRenderRequestMap['typst']
+): Promise<PreviewRenderResultMap['typst']> {
+  return getTypstRenderer().render(request);
+}

packages/frontend/core/src/modules/code-block-preview-renderer/runtime-config.ts

@@ -0,0 +1,39 @@
+import type {
+  MermaidRenderRequest,
+  MermaidRenderResult,
+} from '@affine/core/modules/mermaid/renderer';
+import type {
+  TypstRenderRequest,
+  TypstRenderResult,
+} from '@affine/core/modules/typst/renderer';
+
+type NativePreviewHandlers = {
+  renderMermaidSvg?: (
+    request: MermaidRenderRequest
+  ) => Promise<MermaidRenderResult>;
+  renderTypstSvg?: (request: TypstRenderRequest) => Promise<TypstRenderResult>;
+};
+
+let enableMermaidWasmNativeRenderer =
+  BUILD_CONFIG.isIOS || BUILD_CONFIG.isAndroid;
+let nativePreviewHandlers: NativePreviewHandlers | null = null;
+
+export function setMermaidWasmNativeRendererEnabled(enabled: boolean) {
+  enableMermaidWasmNativeRenderer = enabled;
+}
+
+export function isMermaidWasmNativeRendererEnabled() {
+  return enableMermaidWasmNativeRenderer;
+}
+
+export function registerNativePreviewHandlers(
+  handlers: NativePreviewHandlers | null
+) {
+  nativePreviewHandlers = handlers;
+}
+
+export function getNativePreviewHandlers() {
+  return nativePreviewHandlers;
+}
+
+export type { NativePreviewHandlers };

packages/frontend/core/src/modules/code-block-preview-renderer/services/preview-renderer-feature-sync.ts

@@ -0,0 +1,26 @@
+import { OnEvent, Service } from '@toeverything/infra';
+import { distinctUntilChanged } from 'rxjs';
+
+import type { FeatureFlagService } from '../../feature-flag';
+import { ApplicationStarted } from '../../lifecycle';
+import { setMermaidWasmNativeRendererEnabled } from '../runtime-config';
+
+@OnEvent(ApplicationStarted, e => e.syncFlag)
+export class PreviewRendererFeatureSyncService extends Service {
+  constructor(private readonly featureFlagService: FeatureFlagService) {
+    super();
+  }
+
+  syncFlag() {
+    const mermaidFlag =
+      this.featureFlagService.flags.enable_mermaid_wasm_native_renderer;
+
+    setMermaidWasmNativeRendererEnabled(!!mermaidFlag.value);
+    const subscription = mermaidFlag.$.pipe(distinctUntilChanged()).subscribe(
+      enabled => {
+        setMermaidWasmNativeRendererEnabled(!!enabled);
+      }
+    );
+    this.disposables.push(() => subscription.unsubscribe());
+  }
+}

packages/frontend/core/src/modules/code-block-preview-renderer/types.ts

@@ -0,0 +1,18 @@
+import type {
+  MermaidRenderRequest,
+  MermaidRenderResult,
+} from '@affine/core/modules/mermaid/renderer';
+import type {
+  TypstRenderRequest,
+  TypstRenderResult,
+} from '@affine/core/modules/typst/renderer';
+
+export type PreviewRenderRequestMap = {
+  mermaid: MermaidRenderRequest;
+  typst: TypstRenderRequest;
+};
+
+export type PreviewRenderResultMap = {
+  mermaid: MermaidRenderResult;
+  typst: TypstRenderResult;
+};

packages/frontend/core/src/modules/feature-flag/constant.ts

@@ -4,6 +4,7 @@ import type { FlagInfo } from './types';
 const isCanaryBuild = BUILD_CONFIG.appBuildType === 'canary';
 const isMobile = BUILD_CONFIG.isMobileEdition;
 const isIOS = BUILD_CONFIG.isIOS;
+const isAndroid = BUILD_CONFIG.isAndroid;
 
 export const AFFINE_FLAGS = {
   enable_ai: {
@@ -203,6 +204,14 @@ export const AFFINE_FLAGS = {
     configurable: isMobile && isIOS,
     defaultState: isMobile && isIOS,
   },
+  enable_mermaid_wasm_native_renderer: {
+    category: 'affine',
+    displayName: 'Enable Native Mermaid Renderer',
+    description:
+      'Use the new Mermaid renderer backend. Web uses WASM, desktop uses native, and mobile always uses native. The native renderer is more than 10x faster, but its styling/aesthetic quality and the types of graphics it supports are not as good as the JS version.',
+    configurable: !isIOS && !isAndroid,
+    defaultState: isIOS || isAndroid,
+  },
   enable_turbo_renderer: {
     category: 'blocksuite',
     bsFlag: 'enable_turbo_renderer',

packages/frontend/core/src/modules/index.ts

@@ -13,6 +13,7 @@ import { configureAppSidebarModule } from './app-sidebar';
 import { configAtMenuConfigModule } from './at-menu-config';
 import { configureBlobManagementModule } from './blob-management';
 import { configureCloudModule } from './cloud';
+import { configureCodeBlockPreviewRendererModule } from './code-block-preview-renderer';
 import { configureCollectionModule } from './collection';
 import { configureCollectionRulesModule } from './collection-rules';
 import { configureCommentModule } from './comment';
@@ -77,6 +78,7 @@ export function configureCommonModules(framework: Framework) {
   configureGlobalContextModule(framework);
   configureLifecycleModule(framework);
   configureFeatureFlagModule(framework);
+  configureCodeBlockPreviewRendererModule(framework);
   configureCollectionModule(framework);
   configureNavigationModule(framework);
   configureTagModule(framework);

packages/frontend/core/src/modules/mermaid/renderer/index.ts

@@ -0,0 +1,39 @@
+import { WorkerOpRenderer } from '../../shared/worker-op-renderer';
+import type {
+  MermaidOps,
+  MermaidRenderOptions,
+  MermaidRenderRequest,
+} from './types';
+
+class MermaidRenderer extends WorkerOpRenderer<MermaidOps> {
+  constructor() {
+    super('mermaid');
+  }
+
+  init(options?: MermaidRenderOptions) {
+    return this.ensureInitialized(() => this.call('init', options));
+  }
+
+  async render(request: MermaidRenderRequest) {
+    await this.init();
+    return this.call('render', request);
+  }
+}
+
+let sharedMermaidRenderer: MermaidRenderer | null = null;
+
+export function getMermaidRenderer() {
+  if (!sharedMermaidRenderer) {
+    sharedMermaidRenderer = new MermaidRenderer();
+  }
+  return sharedMermaidRenderer;
+}
+
+export type {
+  MermaidOps,
+  MermaidRenderOptions,
+  MermaidRenderRequest,
+  MermaidRenderResult,
+  MermaidRenderTheme,
+  MermaidTextMetrics,
+} from './types';

packages/frontend/core/src/modules/mermaid/renderer/mermaid.worker.ts

@@ -0,0 +1,63 @@
+import type { MessageCommunicapable } from '@toeverything/infra/op';
+import { OpConsumer } from '@toeverything/infra/op';
+import initMmdr, { render_mermaid_svg } from '@toeverything/mermaid-wasm';
+
+import type {
+  MermaidOps,
+  MermaidRenderOptions,
+  MermaidRenderRequest,
+} from './types';
+
+const DEFAULT_RENDER_OPTIONS: MermaidRenderOptions = {
+  fastText: true,
+  svgOnly: true,
+  theme: 'modern',
+  fontFamily: 'IBM Plex Mono',
+};
+
+function mergeOptions(
+  base: MermaidRenderOptions,
+  override: MermaidRenderOptions | undefined
+): MermaidRenderOptions {
+  if (!override) {
+    return base;
+  }
+  return {
+    ...base,
+    ...override,
+    textMetrics: override.textMetrics ?? base.textMetrics,
+  };
+}
+
+class MermaidRendererBackend extends OpConsumer<MermaidOps> {
+  private initPromise: Promise<void> | null = null;
+  private options: MermaidRenderOptions = DEFAULT_RENDER_OPTIONS;
+
+  constructor(port: MessageCommunicapable) {
+    super(port);
+    this.register('init', this.init.bind(this));
+    this.register('render', this.render.bind(this));
+  }
+
+  private ensureReady() {
+    if (!this.initPromise) {
+      this.initPromise = initMmdr().then(() => undefined);
+    }
+    return this.initPromise;
+  }
+
+  async init(options?: MermaidRenderOptions) {
+    this.options = mergeOptions(DEFAULT_RENDER_OPTIONS, options);
+    await this.ensureReady();
+    return { ok: true } as const;
+  }
+
+  async render({ code, options }: MermaidRenderRequest) {
+    await this.ensureReady();
+    const mergedOptions = mergeOptions(this.options, options);
+    const svg = render_mermaid_svg(code, JSON.stringify(mergedOptions));
+    return { svg };
+  }
+}
+
+new MermaidRendererBackend(self as MessageCommunicapable);

packages/frontend/core/src/modules/mermaid/renderer/types.ts

@@ -0,0 +1,32 @@
+import type { OpSchema } from '@toeverything/infra/op';
+
+export type MermaidTextMetrics = {
+  ascii: number;
+  cjk: number;
+  space: number;
+};
+
+export type MermaidRenderTheme = 'modern' | 'default';
+
+export type MermaidRenderOptions = {
+  fastText?: boolean;
+  svgOnly?: boolean;
+  textMetrics?: MermaidTextMetrics;
+  theme?: MermaidRenderTheme;
+  fontFamily?: string;
+  fontSize?: number;
+};
+
+export type MermaidRenderRequest = {
+  code: string;
+  options?: MermaidRenderOptions;
+};
+
+export type MermaidRenderResult = {
+  svg: string;
+};
+
+export interface MermaidOps extends OpSchema {
+  init: [MermaidRenderOptions | undefined, { ok: true }];
+  render: [MermaidRenderRequest, MermaidRenderResult];
+}

packages/frontend/core/src/modules/pdf/renderer/index.ts

@@ -1,2 +1,10 @@
-export { PDFRenderer } from './renderer';
-export type { PDFMeta, RenderedPage, RenderPageOpts } from './types';
+import { WorkerOpRenderer } from '../../shared/worker-op-renderer';
+import type { PDFOps } from './types';
+
+export class PDFRenderer extends WorkerOpRenderer<PDFOps> {
+  constructor() {
+    super('pdf');
+  }
+}
+
+export type { PDFMeta, PDFOps, RenderedPage, RenderPageOpts } from './types';

packages/frontend/core/src/modules/pdf/renderer/ops.ts

@@ -1,8 +0,0 @@
-import type { OpSchema } from '@toeverything/infra/op';
-
-import type { PDFMeta, RenderedPage, RenderPageOpts } from './types';
-
-export interface ClientOps extends OpSchema {
-  open: [{ data: ArrayBuffer }, PDFMeta];
-  render: [RenderPageOpts, RenderedPage];
-}

packages/frontend/core/src/modules/pdf/renderer/pdf.worker.ts

@@ -23,10 +23,9 @@ import {
   switchMap,
 } from 'rxjs';
 
-import type { ClientOps } from './ops';
-import type { PDFMeta, RenderPageOpts } from './types';
+import type { PDFMeta, PDFOps, RenderPageOpts } from './types';
 
-class PDFRendererBackend extends OpConsumer<ClientOps> {
+class PDFRendererBackend extends OpConsumer<PDFOps> {
   constructor(port: MessageCommunicapable) {
     super(port);
     this.register('open', this.open.bind(this));

packages/frontend/core/src/modules/pdf/renderer/renderer.ts

@@ -1,24 +0,0 @@
-import { getWorkerUrl } from '@affine/env/worker';
-import { OpClient } from '@toeverything/infra/op';
-
-import type { ClientOps } from './ops';
-
-export class PDFRenderer extends OpClient<ClientOps> {
-  private readonly worker: Worker;
-
-  constructor() {
-    const worker = new Worker(getWorkerUrl('pdf'));
-    super(worker);
-
-    this.worker = worker;
-  }
-
-  override destroy() {
-    super.destroy();
-    this.worker.terminate();
-  }
-
-  [Symbol.dispose]() {
-    this.destroy();
-  }
-}

packages/frontend/core/src/modules/pdf/renderer/types.ts

@@ -1,3 +1,5 @@
+import type { OpSchema } from '@toeverything/infra/op';
+
 export type PageSize = {
   width: number;
   height: number;
@@ -21,3 +23,8 @@ export type RenderPageOpts = {
 export type RenderedPage = {
   bitmap: ImageBitmap;
 };
+
+export interface PDFOps extends OpSchema {
+  open: [{ data: ArrayBuffer }, PDFMeta];
+  render: [RenderPageOpts, RenderedPage];
+}

packages/frontend/core/src/modules/shared/worker-op-renderer.spec.ts

@@ -0,0 +1,42 @@
+import { beforeEach, describe, expect, test, vi } from 'vitest';
+
+import { WorkerOpRenderer } from './worker-op-renderer';
+
+vi.mock('@affine/env/worker', () => ({
+  getWorkerUrl: vi.fn(() => '/worker.js'),
+}));
+
+class MockWorker {
+  addEventListener = vi.fn();
+  postMessage = vi.fn();
+  removeEventListener = vi.fn();
+  terminate = vi.fn();
+}
+
+class TestRenderer extends WorkerOpRenderer<{
+  init: [undefined, { ok: true }];
+}> {
+  constructor() {
+    super('test');
+  }
+
+  init() {
+    return this.ensureInitialized(async () => {
+      return { ok: true } as const;
+    });
+  }
+}
+
+describe('WorkerOpRenderer', () => {
+  beforeEach(() => {
+    vi.stubGlobal('Worker', MockWorker);
+  });
+
+  test('rejects initialization after destroy', async () => {
+    const renderer = new TestRenderer();
+
+    renderer.destroy();
+
+    await expect(renderer.init()).rejects.toThrow('renderer destroyed');
+  });
+});

packages/frontend/core/src/modules/shared/worker-op-renderer.ts

@@ -0,0 +1,47 @@
+import { getWorkerUrl } from '@affine/env/worker';
+import { OpClient, type OpSchema } from '@toeverything/infra/op';
+
+type InitTask = () => Promise<unknown>;
+
+export abstract class WorkerOpRenderer<
+  Ops extends OpSchema,
+> extends OpClient<Ops> {
+  private readonly worker: Worker;
+  private destroyed = false;
+  private initPromise: Promise<void> | null = null;
+
+  protected constructor(workerName: string) {
+    const worker = new Worker(getWorkerUrl(workerName));
+    super(worker);
+    this.worker = worker;
+  }
+
+  protected ensureInitialized(task: InitTask) {
+    if (this.destroyed) return Promise.reject(new Error('renderer destroyed'));
+    if (!this.initPromise) {
+      this.initPromise = task()
+        .then(() => undefined)
+        .catch(error => {
+          this.initPromise = null;
+          throw error;
+        });
+    }
+    return this.initPromise;
+  }
+
+  protected resetInitialization() {
+    this.initPromise = null;
+  }
+
+  override destroy() {
+    if (this.destroyed) return;
+    this.destroyed = true;
+    super.destroy();
+    this.worker.terminate();
+    this.resetInitialization();
+  }
+
+  [Symbol.dispose]() {
+    this.destroy();
+  }
+}

packages/frontend/core/src/modules/typst/renderer/index.ts

@@ -0,0 +1,33 @@
+import { WorkerOpRenderer } from '../../shared/worker-op-renderer';
+import type { TypstOps, TypstRenderOptions, TypstRenderRequest } from './types';
+
+class TypstRenderer extends WorkerOpRenderer<TypstOps> {
+  constructor() {
+    super('typst');
+  }
+
+  init(options?: TypstRenderOptions) {
+    return this.ensureInitialized(() => this.call('init', options));
+  }
+
+  async render(request: TypstRenderRequest) {
+    await this.init();
+    return this.call('render', request);
+  }
+}
+
+let sharedTypstRenderer: TypstRenderer | null = null;
+
+export function getTypstRenderer() {
+  if (!sharedTypstRenderer) {
+    sharedTypstRenderer = new TypstRenderer();
+  }
+  return sharedTypstRenderer;
+}
+
+export type {
+  TypstOps,
+  TypstRenderOptions,
+  TypstRenderRequest,
+  TypstRenderResult,
+} from './types';

packages/frontend/core/src/modules/typst/renderer/runtime.spec.ts

@@ -0,0 +1,84 @@
+import { beforeEach, describe, expect, test, vi } from 'vitest';
+
+const { loadFonts, setCompilerInitOptions, setRendererInitOptions, svg } =
+  vi.hoisted(() => ({
+    loadFonts: vi.fn((fontUrls: string[]) => ({ fontUrls })),
+    setCompilerInitOptions: vi.fn(),
+    setRendererInitOptions: vi.fn(),
+    svg: vi.fn(),
+  }));
+
+vi.mock('@myriaddreamin/typst.ts', () => ({
+  $typst: {
+    setCompilerInitOptions,
+    setRendererInitOptions,
+    svg,
+  },
+  loadFonts,
+}));
+
+import { ensureTypstReady, renderTypstSvgWithOptions } from './runtime';
+
+describe('typst runtime', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    svg.mockResolvedValue('<svg />');
+  });
+
+  test('reconfigures typst when fontUrls change', async () => {
+    await ensureTypstReady(['font-a']);
+    await ensureTypstReady(['font-b']);
+
+    expect(loadFonts).toHaveBeenNthCalledWith(
+      1,
+      ['font-a'],
+      expect.any(Object)
+    );
+    expect(loadFonts).toHaveBeenNthCalledWith(
+      2,
+      ['font-b'],
+      expect.any(Object)
+    );
+    expect(setCompilerInitOptions).toHaveBeenCalledTimes(2);
+    expect(setRendererInitOptions).toHaveBeenCalledTimes(2);
+  });
+
+  test('serializes typst renders that need different configuration', async () => {
+    const events: string[] = [];
+    let releaseFirstRender!: () => void;
+
+    svg.mockImplementationOnce(async () => {
+      events.push('svg:first:start');
+      await new Promise<void>(resolve => {
+        releaseFirstRender = resolve;
+      });
+      events.push('svg:first:end');
+      return '<svg>first</svg>';
+    });
+    svg.mockImplementationOnce(async () => {
+      events.push('svg:second:start');
+      return '<svg>second</svg>';
+    });
+
+    const first = renderTypstSvgWithOptions('= First', {
+      fontUrls: ['font-a'],
+    });
+    const second = renderTypstSvgWithOptions('= Second', {
+      fontUrls: ['font-b'],
+    });
+
+    await vi.waitFor(() => {
+      expect(events).toEqual(['svg:first:start']);
+    });
+
+    releaseFirstRender();
+
+    await expect(first).resolves.toEqual({ svg: '<svg>first</svg>' });
+    await expect(second).resolves.toEqual({ svg: '<svg>second</svg>' });
+    expect(events).toEqual([
+      'svg:first:start',
+      'svg:first:end',
+      'svg:second:start',
+    ]);
+  });
+});

packages/frontend/core/src/modules/typst/renderer/runtime.ts

@@ -0,0 +1,209 @@
+import { $typst, type BeforeBuildFn, loadFonts } from '@myriaddreamin/typst.ts';
+
+import type { TypstRenderOptions } from './types';
+
+export const DEFAULT_TYPST_FONT_URLS = [
+  'https://cdn.affine.pro/fonts/Inter-Regular.woff',
+  'https://cdn.affine.pro/fonts/Inter-SemiBold.woff',
+  'https://cdn.affine.pro/fonts/Inter-Italic.woff',
+  'https://cdn.affine.pro/fonts/Inter-SemiBoldItalic.woff',
+  'https://cdn.affine.pro/fonts/SarasaGothicCL-Regular.ttf',
+] as const;
+
+export const DEFAULT_TYPST_RENDER_OPTIONS: TypstRenderOptions = {
+  fontUrls: [...DEFAULT_TYPST_FONT_URLS],
+};
+
+const DEFAULT_FONT_FALLBACKS: Record<string, string> = {
+  'Inter-Regular.woff': 'Inter-Regular.woff2',
+  'Inter-SemiBold.woff': 'Inter-SemiBold.woff2',
+  'Inter-Italic.woff': 'Inter-Italic.woff2',
+  'Inter-SemiBoldItalic.woff': 'Inter-SemiBoldItalic.woff2',
+  'SarasaGothicCL-Regular.ttf': 'Inter-Regular.woff2',
+  'Inter-Regular.woff2': 'Inter-Regular.woff2',
+  'Inter-SemiBold.woff2': 'Inter-SemiBold.woff2',
+  'Inter-Italic.woff2': 'Inter-Italic.woff2',
+  'Inter-SemiBoldItalic.woff2': 'Inter-SemiBoldItalic.woff2',
+};
+
+const compilerWasmUrl = new URL(
+  '@myriaddreamin/typst-ts-web-compiler/pkg/typst_ts_web_compiler_bg.wasm',
+  import.meta.url
+).toString();
+
+const rendererWasmUrl = new URL(
+  '@myriaddreamin/typst-ts-renderer/pkg/typst_ts_renderer_bg.wasm',
+  import.meta.url
+).toString();
+
+type TypstWasmModuleUrls = {
+  compilerWasmUrl?: string;
+  rendererWasmUrl?: string;
+};
+
+type TypstInitState = {
+  key: string;
+  promise: Promise<void>;
+};
+
+let typstInitState: TypstInitState | null = null;
+let typstRenderQueue: Promise<void> = Promise.resolve();
+
+function extractInputUrl(input: RequestInfo | URL): string | null {
+  if (input instanceof URL) {
+    return input.toString();
+  }
+  if (typeof input === 'string') {
+    return input;
+  }
+  if (typeof Request !== 'undefined' && input instanceof Request) {
+    return input.url;
+  }
+  return null;
+}
+
+function resolveLocalFallbackFontUrl(sourceUrl: string): string | null {
+  if (typeof location === 'undefined') {
+    return null;
+  }
+
+  const source = new URL(sourceUrl, location.href);
+  const fileName = source.pathname.split('/').at(-1);
+  if (!fileName) {
+    return null;
+  }
+
+  const fallbackFileName = DEFAULT_FONT_FALLBACKS[fileName];
+  if (!fallbackFileName) {
+    return null;
+  }
+
+  const workerUrl = new URL(location.href);
+  const jsPathMarker = '/js/';
+  const markerIndex = workerUrl.pathname.lastIndexOf(jsPathMarker);
+  const basePath =
+    markerIndex >= 0 ? workerUrl.pathname.slice(0, markerIndex + 1) : '/';
+
+  return new URL(
+    `${basePath}fonts/${fallbackFileName}`,
+    workerUrl.origin
+  ).toString();
+}
+
+export function createTypstFontFetcher(baseFetcher: typeof fetch = fetch) {
+  return async (input: RequestInfo | URL, init?: RequestInit) => {
+    const sourceUrl = extractInputUrl(input);
+    const fallbackUrl = sourceUrl
+      ? resolveLocalFallbackFontUrl(sourceUrl)
+      : null;
+
+    try {
+      const response = await baseFetcher(input, init);
+      if (!fallbackUrl || response.ok || fallbackUrl === sourceUrl) {
+        return response;
+      }
+
+      const fallbackResponse = await baseFetcher(fallbackUrl, init);
+      return fallbackResponse.ok ? fallbackResponse : response;
+    } catch (error) {
+      if (!fallbackUrl || fallbackUrl === sourceUrl) {
+        throw error;
+      }
+
+      return baseFetcher(fallbackUrl, init);
+    }
+  };
+}
+
+export function mergeTypstRenderOptions(
+  base: TypstRenderOptions,
+  override: TypstRenderOptions | undefined
+): TypstRenderOptions {
+  return {
+    ...base,
+    ...override,
+    fontUrls: override?.fontUrls ?? base.fontUrls,
+  };
+}
+
+function getBeforeBuildHooks(fontUrls: string[]): BeforeBuildFn[] {
+  return [
+    loadFonts([...fontUrls], {
+      assets: ['text'],
+      fetcher: createTypstFontFetcher(),
+    }),
+  ];
+}
+
+function createTypstInitKey(
+  fontUrls: string[],
+  wasmModuleUrls: TypstWasmModuleUrls
+) {
+  return JSON.stringify({
+    fontUrls,
+    compilerWasmUrl: wasmModuleUrls.compilerWasmUrl ?? compilerWasmUrl,
+    rendererWasmUrl: wasmModuleUrls.rendererWasmUrl ?? rendererWasmUrl,
+  });
+}
+
+function enqueueTypstRender<T>(task: () => Promise<T>): Promise<T> {
+  const run = typstRenderQueue.then(task, task);
+  typstRenderQueue = run.then(
+    () => undefined,
+    () => undefined
+  );
+  return run;
+}
+
+export async function ensureTypstReady(
+  fontUrls: string[],
+  wasmModuleUrls: TypstWasmModuleUrls = {}
+) {
+  const key = createTypstInitKey(fontUrls, wasmModuleUrls);
+  if (typstInitState?.key === key) {
+    return typstInitState.promise;
+  }
+
+  const promise = Promise.resolve()
+    .then(() => {
+      const compilerBeforeBuild = getBeforeBuildHooks(fontUrls);
+
+      $typst.setCompilerInitOptions({
+        beforeBuild: compilerBeforeBuild,
+        getModule: () => wasmModuleUrls.compilerWasmUrl ?? compilerWasmUrl,
+      });
+      $typst.setRendererInitOptions({
+        getModule: () => wasmModuleUrls.rendererWasmUrl ?? rendererWasmUrl,
+      });
+    })
+    .catch(error => {
+      if (typstInitState?.key === key) {
+        typstInitState = null;
+      }
+      throw error;
+    });
+
+  typstInitState = { key, promise };
+  return promise;
+}
+
+export async function renderTypstSvgWithOptions(
+  code: string,
+  options: TypstRenderOptions | undefined,
+  wasmModuleUrls?: TypstWasmModuleUrls
+) {
+  const resolvedOptions = mergeTypstRenderOptions(
+    DEFAULT_TYPST_RENDER_OPTIONS,
+    options
+  );
+  return enqueueTypstRender(async () => {
+    await ensureTypstReady(
+      resolvedOptions.fontUrls ?? [...DEFAULT_TYPST_FONT_URLS],
+      wasmModuleUrls
+    );
+    const svg = await $typst.svg({
+      mainContent: code,
+    });
+    return { svg };
+  });
+}

packages/frontend/core/src/modules/typst/renderer/types.ts

@@ -0,0 +1,19 @@
+import type { OpSchema } from '@toeverything/infra/op';
+
+export type TypstRenderOptions = {
+  fontUrls?: string[];
+};
+
+export type TypstRenderRequest = {
+  code: string;
+  options?: TypstRenderOptions;
+};
+
+export type TypstRenderResult = {
+  svg: string;
+};
+
+export interface TypstOps extends OpSchema {
+  init: [TypstRenderOptions | undefined, { ok: true }];
+  render: [TypstRenderRequest, TypstRenderResult];
+}

packages/frontend/core/src/modules/typst/renderer/typst.worker.ts

@@ -0,0 +1,40 @@
+import type { MessageCommunicapable } from '@toeverything/infra/op';
+import { OpConsumer } from '@toeverything/infra/op';
+
+import {
+  DEFAULT_TYPST_RENDER_OPTIONS,
+  ensureTypstReady,
+  mergeTypstRenderOptions,
+  renderTypstSvgWithOptions,
+} from './runtime';
+import type { TypstOps, TypstRenderOptions, TypstRenderRequest } from './types';
+
+class TypstRendererBackend extends OpConsumer<TypstOps> {
+  private options: TypstRenderOptions = DEFAULT_TYPST_RENDER_OPTIONS;
+
+  constructor(port: MessageCommunicapable) {
+    super(port);
+    this.register('init', this.init.bind(this));
+    this.register('render', this.render.bind(this));
+  }
+
+  async init(options?: TypstRenderOptions) {
+    this.options = mergeTypstRenderOptions(
+      DEFAULT_TYPST_RENDER_OPTIONS,
+      options
+    );
+    await ensureTypstReady(
+      this.options.fontUrls ?? [
+        ...(DEFAULT_TYPST_RENDER_OPTIONS.fontUrls ?? []),
+      ]
+    );
+    return { ok: true } as const;
+  }
+
+  async render({ code, options }: TypstRenderRequest) {
+    const mergedOptions = mergeTypstRenderOptions(this.options, options);
+    return renderTypstSvgWithOptions(code, mergedOptions);
+  }
+}
+
+new TypstRendererBackend(self as MessageCommunicapable);

packages/frontend/mobile-native/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 edition = "2024"
 name    = "affine_mobile_native"
+publish = false
 version = "0.0.0"
 
 [lib]
@@ -40,7 +41,11 @@ objc2-foundation = { workspace = true, features = [
 homedir = { workspace = true }
 
 [target.'cfg(any(target_os = "android", target_os = "ios"))'.dependencies]
-lru = { workspace = true }
+lru                 = { workspace = true }
+mermaid-rs-renderer = { workspace = true }
+typst               = { workspace = true }
+typst-as-lib        = { workspace = true }
+typst-svg           = { workspace = true }
 
 [build-dependencies]
 uniffi = { workspace = true, features = ["build"] }

packages/frontend/mobile-native/src/lib.rs

@@ -1,6 +1,8 @@
 mod error;
 mod ffi_types;
 mod payload_codec;
+#[cfg(any(target_os = "android", target_os = "ios"))]
+mod preview;
 mod storage;
 #[cfg(test)]
 mod tests;
@@ -14,6 +16,8 @@ pub use error::UniffiError;
 pub use ffi_types::{
   Blob, BlockInfo, CrawlResult, DocClock, DocRecord, DocUpdate, ListedBlob, MatchRange, SearchHit, SetBlob,
 };
+#[cfg(any(target_os = "android", target_os = "ios"))]
+pub use preview::{render_mermaid_preview_svg, render_typst_preview_svg};
 pub use storage::{DocStoragePool, new_doc_storage_pool};
 
 uniffi::setup_scaffolding!("affine_mobile_native");

packages/frontend/mobile-native/src/preview.rs

@@ -0,0 +1,155 @@
+use std::{borrow::Cow, path::PathBuf};
+
+use mermaid_rs_renderer::RenderOptions;
+use typst::{
+  diag::FileResult,
+  foundations::Bytes,
+  layout::{Abs, PagedDocument},
+  syntax::{FileId, Source},
+};
+use typst_as_lib::{
+  TypstEngine,
+  cached_file_resolver::{CachedFileResolver, IntoCachedFileResolver},
+  file_resolver::FileResolver,
+  package_resolver::{FileSystemCache, PackageResolver},
+  typst_kit_options::TypstKitFontOptions,
+};
+
+use crate::{Result, UniffiError};
+
+const TYPST_PACKAGE_CACHE_DIR: &str = "typst-package-cache";
+
+enum MobileTypstPackageResolver {
+  FileSystem(CachedFileResolver<PackageResolver<FileSystemCache>>),
+  InMemory(CachedFileResolver<PackageResolver<typst_as_lib::package_resolver::InMemoryCache>>),
+}
+
+impl FileResolver for MobileTypstPackageResolver {
+  fn resolve_binary(&self, id: FileId) -> FileResult<Cow<'_, Bytes>> {
+    match self {
+      Self::FileSystem(resolver) => resolver.resolve_binary(id),
+      Self::InMemory(resolver) => resolver.resolve_binary(id),
+    }
+  }
+
+  fn resolve_source(&self, id: FileId) -> FileResult<Cow<'_, Source>> {
+    match self {
+      Self::FileSystem(resolver) => resolver.resolve_source(id),
+      Self::InMemory(resolver) => resolver.resolve_source(id),
+    }
+  }
+}
+
+fn resolve_mermaid_render_options(
+  theme: Option<String>,
+  font_family: Option<String>,
+  font_size: Option<f64>,
+) -> RenderOptions {
+  let mut render_options = match theme.as_deref() {
+    Some("default") => RenderOptions::mermaid_default(),
+    _ => RenderOptions::modern(),
+  };
+
+  if let Some(font_family) = font_family {
+    render_options.theme.font_family = font_family;
+  }
+
+  if let Some(font_size) = font_size {
+    render_options.theme.font_size = font_size as f32;
+  }
+
+  render_options
+}
+
+#[uniffi::export]
+pub fn render_mermaid_preview_svg(
+  code: String,
+  theme: Option<String>,
+  font_family: Option<String>,
+  font_size: Option<f64>,
+) -> Result<String> {
+  let render_options = resolve_mermaid_render_options(theme, font_family, font_size);
+
+  mermaid_rs_renderer::render_with_options(&code, render_options).map_err(|error| UniffiError::Err(error.to_string()))
+}
+
+fn normalize_typst_svg(svg: String) -> String {
+  let mut svg = svg;
+  let page_background_marker = r##"<path class="typst-shape""##;
+  let mut cursor = 0;
+
+  while let Some(relative_idx) = svg[cursor..].find(page_background_marker) {
+    let idx = cursor + relative_idx;
+    let rest = &svg[idx..];
+    let Some(relative_end) = rest.find("/>") else {
+      break;
+    };
+
+    let end = idx + relative_end + 2;
+    let path_fragment = &svg[idx..end];
+    let is_page_background_path =
+      path_fragment.contains(r#"d="M 0 0v "#) && path_fragment.contains(r#" h "#) && path_fragment.contains(r#" v -"#);
+
+    if is_page_background_path {
+      svg.replace_range(idx..end, "");
+      cursor = idx;
+      continue;
+    }
+
+    cursor = end;
+  }
+
+  svg
+}
+
+fn resolve_typst_font_dirs(font_dirs: Option<Vec<String>>) -> Vec<PathBuf> {
+  font_dirs
+    .map(|dirs| dirs.into_iter().map(PathBuf::from).collect())
+    .unwrap_or_default()
+}
+
+fn resolve_typst_package_resolver(cache_dir: Option<String>) -> Result<MobileTypstPackageResolver> {
+  let resolver = match cache_dir {
+    Some(cache_dir) => {
+      let cache_dir = PathBuf::from(cache_dir).join(TYPST_PACKAGE_CACHE_DIR);
+      std::fs::create_dir_all(&cache_dir).map_err(|error| UniffiError::Err(error.to_string()))?;
+      MobileTypstPackageResolver::FileSystem(
+        PackageResolver::builder()
+          .cache(FileSystemCache(cache_dir))
+          .build()
+          .into_cached(),
+      )
+    }
+    None => {
+      MobileTypstPackageResolver::InMemory(PackageResolver::builder().with_in_memory_cache().build().into_cached())
+    }
+  };
+
+  Ok(resolver)
+}
+
+#[uniffi::export]
+pub fn render_typst_preview_svg(
+  code: String,
+  font_dirs: Option<Vec<String>>,
+  cache_dir: Option<String>,
+) -> Result<String> {
+  let search_options = TypstKitFontOptions::new()
+    .include_system_fonts(false)
+    .include_embedded_fonts(true)
+    .include_dirs(resolve_typst_font_dirs(font_dirs));
+  let package_resolver = resolve_typst_package_resolver(cache_dir)?;
+
+  let engine = TypstEngine::builder()
+    .main_file(code)
+    .search_fonts_with(search_options)
+    .add_file_resolver(package_resolver)
+    .build();
+
+  let document = engine
+    .compile::<PagedDocument>()
+    .output
+    .map_err(|error| UniffiError::Err(error.to_string()))?;
+
+  Ok(normalize_typst_svg(typst_svg::svg_merged(&document, Abs::pt(0.0))))
+}

packages/frontend/native/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 edition = "2024"
 name    = "affine_native"
+publish = false
 version = "0.0.0"
 
 [lib]
@@ -25,6 +26,12 @@ sqlx = { workspace = true, default-features = false, features = [
 thiserror = { workspace = true }
 tokio = { workspace = true, features = ["full"] }
 
+[target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
+mermaid-rs-renderer = { workspace = true }
+typst               = { workspace = true }
+typst-as-lib        = { workspace = true }
+typst-svg           = { workspace = true }
+
 [target.'cfg(not(target_os = "linux"))'.dependencies]
 mimalloc = { workspace = true }
 

packages/frontend/native/index.d.ts

@@ -40,8 +40,41 @@ export declare function decodeAudio(buf: Uint8Array, destSampleRate?: number | u
 
 /** Decode audio file into a Float32Array */
 export declare function decodeAudioSync(buf: Uint8Array, destSampleRate?: number | undefined | null, filename?: string | undefined | null): Float32Array
+export interface MermaidRenderOptions {
+  theme?: string
+  fontFamily?: string
+  fontSize?: number
+}
+
+export interface MermaidRenderRequest {
+  code: string
+  options?: MermaidRenderOptions
+}
+
+export interface MermaidRenderResult {
+  svg: string
+}
+
 export declare function mintChallengeResponse(resource: string, bits?: number | undefined | null): Promise<string>
 
+export declare function renderMermaidSvg(request: MermaidRenderRequest): MermaidRenderResult
+
+export declare function renderTypstSvg(request: TypstRenderRequest): TypstRenderResult
+
+export interface TypstRenderOptions {
+  fontUrls?: Array<string>
+  fontDirs?: Array<string>
+}
+
+export interface TypstRenderRequest {
+  code: string
+  options?: TypstRenderOptions
+}
+
+export interface TypstRenderResult {
+  svg: string
+}
+
 export declare function verifyChallengeResponse(response: string, bits: number, resource: string): Promise<boolean>
 export declare class DocStorage {
   constructor(path: string)

packages/frontend/native/index.js

@@ -580,6 +580,8 @@ module.exports.ShareableContent = nativeBinding.ShareableContent
 module.exports.decodeAudio = nativeBinding.decodeAudio
 module.exports.decodeAudioSync = nativeBinding.decodeAudioSync
 module.exports.mintChallengeResponse = nativeBinding.mintChallengeResponse
+module.exports.renderMermaidSvg = nativeBinding.renderMermaidSvg
+module.exports.renderTypstSvg = nativeBinding.renderTypstSvg
 module.exports.verifyChallengeResponse = nativeBinding.verifyChallengeResponse
 module.exports.DocStorage = nativeBinding.DocStorage
 module.exports.DocStoragePool = nativeBinding.DocStoragePool

packages/frontend/native/media_capture/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 edition = "2024"
 name    = "affine_media_capture"
+publish = false
 version = "0.0.0"
 
 [lib]

packages/frontend/native/nbstore/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 edition = "2024"
 name    = "affine_nbstore"
+publish = false
 version = "0.0.0"
 
 [lib]

packages/frontend/native/schema/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 edition = "2024"
 name    = "affine_schema"
+publish = false
 version = "0.0.0"
 
 [dependencies]

packages/frontend/native/sqlite_v1/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 edition = "2024"
 name    = "affine_sqlite_v1"
+publish = false
 version = "0.0.0"
 
 [lib]

packages/frontend/native/src/lib.rs

@@ -1,4 +1,6 @@
 pub mod hashcash;
+#[cfg(not(any(target_os = "android", target_os = "ios")))]
+pub mod preview;
 
 #[cfg(not(target_arch = "arm"))]
 #[global_allocator]

packages/frontend/native/src/preview.rs

@@ -0,0 +1,191 @@
+use std::path::PathBuf;
+
+use mermaid_rs_renderer::RenderOptions;
+use napi::{Error, Result};
+use napi_derive::napi;
+use typst::layout::{Abs, PagedDocument};
+use typst_as_lib::{TypstEngine, typst_kit_options::TypstKitFontOptions};
+
+#[napi(object)]
+pub struct MermaidRenderOptions {
+  pub theme: Option<String>,
+  pub font_family: Option<String>,
+  pub font_size: Option<f64>,
+}
+
+#[napi(object)]
+pub struct MermaidRenderRequest {
+  pub code: String,
+  pub options: Option<MermaidRenderOptions>,
+}
+
+#[napi(object)]
+pub struct MermaidRenderResult {
+  pub svg: String,
+}
+
+fn resolve_mermaid_render_options(options: Option<MermaidRenderOptions>) -> RenderOptions {
+  let mut render_options = match options.as_ref().and_then(|options| options.theme.as_deref()) {
+    Some("default") => RenderOptions::mermaid_default(),
+    _ => RenderOptions::modern(),
+  };
+
+  if let Some(options) = options {
+    if let Some(font_family) = options.font_family {
+      render_options.theme.font_family = font_family;
+    }
+
+    if let Some(font_size) = options.font_size {
+      render_options.theme.font_size = font_size as f32;
+    }
+  }
+
+  render_options
+}
+
+#[napi]
+pub fn render_mermaid_svg(request: MermaidRenderRequest) -> Result<MermaidRenderResult> {
+  let render_options = resolve_mermaid_render_options(request.options);
+  let svg = mermaid_rs_renderer::render_with_options(&request.code, render_options)
+    .map_err(|error| Error::from_reason(error.to_string()))?;
+
+  Ok(MermaidRenderResult { svg })
+}
+
+#[napi(object)]
+pub struct TypstRenderOptions {
+  pub font_urls: Option<Vec<String>>,
+  pub font_dirs: Option<Vec<String>>,
+}
+
+#[napi(object)]
+pub struct TypstRenderRequest {
+  pub code: String,
+  pub options: Option<TypstRenderOptions>,
+}
+
+#[napi(object)]
+pub struct TypstRenderResult {
+  pub svg: String,
+}
+
+fn resolve_local_font_dir(value: &str) -> Option<PathBuf> {
+  let path = if let Some(stripped) = value.strip_prefix("file://") {
+    PathBuf::from(stripped)
+  } else {
+    let path = PathBuf::from(value);
+    if !path.is_absolute() {
+      return None;
+    }
+    path
+  };
+
+  if path.is_dir() {
+    return Some(path);
+  }
+
+  path.parent().map(|parent| parent.to_path_buf())
+}
+
+fn resolve_typst_font_dirs(options: &Option<TypstRenderOptions>) -> Vec<PathBuf> {
+  let Some(options) = options.as_ref() else {
+    return Vec::new();
+  };
+
+  let mut font_dirs = options
+    .font_dirs
+    .as_ref()
+    .map(|dirs| dirs.iter().map(PathBuf::from).collect::<Vec<_>>())
+    .unwrap_or_default();
+
+  if let Some(font_urls) = options.font_urls.as_ref() {
+    font_dirs.extend(font_urls.iter().filter_map(|url| resolve_local_font_dir(url)));
+  }
+
+  font_dirs
+}
+
+fn normalize_typst_svg(svg: String) -> String {
+  let mut svg = svg;
+  let page_background_marker = r##"<path class="typst-shape""##;
+  let mut cursor = 0;
+
+  while let Some(relative_idx) = svg[cursor..].find(page_background_marker) {
+    let idx = cursor + relative_idx;
+    let rest = &svg[idx..];
+    let Some(relative_end) = rest.find("/>") else {
+      break;
+    };
+
+    let end = idx + relative_end + 2;
+    let path_fragment = &svg[idx..end];
+    let is_page_background_path =
+      path_fragment.contains(r#"d="M 0 0v "#) && path_fragment.contains(r#" h "#) && path_fragment.contains(r#" v -"#);
+
+    if is_page_background_path {
+      svg.replace_range(idx..end, "");
+      cursor = idx;
+      continue;
+    }
+
+    cursor = end;
+  }
+
+  svg
+}
+
+#[napi]
+pub fn render_typst_svg(request: TypstRenderRequest) -> Result<TypstRenderResult> {
+  let font_dirs = resolve_typst_font_dirs(&request.options);
+  let search_options = TypstKitFontOptions::new()
+    .include_system_fonts(false)
+    .include_embedded_fonts(true)
+    .include_dirs(font_dirs);
+
+  let engine = TypstEngine::builder()
+    .main_file(request.code)
+    .search_fonts_with(search_options)
+    .with_package_file_resolver()
+    .build();
+
+  let document = engine
+    .compile::<PagedDocument>()
+    .output
+    .map_err(|error| Error::from_reason(error.to_string()))?;
+
+  let svg = normalize_typst_svg(typst_svg::svg_merged(&document, Abs::pt(0.0)));
+  Ok(TypstRenderResult { svg })
+}
+
+#[cfg(test)]
+mod tests {
+  use super::normalize_typst_svg;
+
+  #[test]
+  fn normalize_typst_svg_removes_all_backgrounds() {
+    let input = r##"<svg>
+    <path class="typst-shape" fill="#ffffff" fill-rule="nonzero" d="M 0 0v 10 h 10 v -10 Z "/>
+    <g></g>
+    <path class="typst-shape" fill="#ffffff" fill-rule="nonzero" d="M 0 0v 10 h 10 v -10 Z "/>
+    <g transform="matrix(1 0 0 1 0 10)"></g>
+    </svg>"##
+      .to_string();
+
+    let normalized = normalize_typst_svg(input);
+    let retained = normalized
+      .matches(r##"<path class="typst-shape" fill="#ffffff" fill-rule="nonzero""##)
+      .count();
+    assert_eq!(retained, 0);
+  }
+
+  #[test]
+  fn normalize_typst_svg_keeps_non_background_paths() {
+    let input = r##"<svg>
+    <path class="typst-shape" fill="#000000" fill-rule="nonzero" d="M 1 2 L 3 4 Z "/>
+    </svg>"##
+      .to_string();
+
+    let normalized = normalize_typst_svg(input);
+    assert!(normalized.contains(r##"d="M 1 2 L 3 4 Z ""##));
+  }
+}

tools/cli/src/bundle.ts

@@ -27,6 +27,9 @@ import {
 
 type WorkerConfig = { name: string };
 type CreateWorkerTargetConfig = (pkg: Package, entry: string) => WorkerConfig;
+type BaseWorkerOptions = {
+  includeMermaidAndTypst?: boolean;
+};
 
 function assertRspackSupportedPackage(pkg: Package) {
   assertRspackSupportedPackageName(pkg.name);
@@ -49,11 +52,13 @@ async function uploadAssetsForPackage(pkg: Package, logger: Logger) {
 
 function getBaseWorkerConfigs(
   pkg: Package,
-  createWorkerTargetConfig: CreateWorkerTargetConfig
+  createWorkerTargetConfig: CreateWorkerTargetConfig,
+  options: BaseWorkerOptions = {}
 ) {
   const core = new Package('@affine/core');
+  const includeMermaidAndTypst = options.includeMermaidAndTypst ?? true;
 
-  return [
+  const workerConfigs = [
     createWorkerTargetConfig(
       pkg,
       core.srcPath.join(
@@ -71,6 +76,21 @@ function getBaseWorkerConfigs(
       ).value
     ),
   ];
+
+  if (includeMermaidAndTypst) {
+    workerConfigs.push(
+      createWorkerTargetConfig(
+        pkg,
+        core.srcPath.join('modules/mermaid/renderer/mermaid.worker.ts').value
+      ),
+      createWorkerTargetConfig(
+        pkg,
+        core.srcPath.join('modules/typst/renderer/typst.worker.ts').value
+      )
+    );
+  }
+
+  return workerConfigs;
 }
 
 function getRspackBundleConfigs(pkg: Package): MultiRspackOptions {
@@ -85,9 +105,7 @@ function getRspackBundleConfigs(pkg: Package): MultiRspackOptions {
       ] as MultiRspackOptions;
     }
     case '@affine/web':
-    case '@affine/mobile':
-    case '@affine/ios':
-    case '@affine/android': {
+    case '@affine/mobile': {
       const workerConfigs = getBaseWorkerConfigs(
         pkg,
         createRspackWorkerTargetConfig
@@ -109,10 +127,35 @@ function getRspackBundleConfigs(pkg: Package): MultiRspackOptions {
         ...workerConfigs,
       ] as MultiRspackOptions;
     }
+    case '@affine/ios':
+    case '@affine/android': {
+      const workerConfigs = getBaseWorkerConfigs(
+        pkg,
+        createRspackWorkerTargetConfig,
+        { includeMermaidAndTypst: false }
+      );
+      workerConfigs.push(
+        createRspackWorkerTargetConfig(
+          pkg,
+          pkg.srcPath.join('nbstore.worker.ts').value
+        )
+      );
+
+      return [
+        createRspackHTMLTargetConfig(
+          pkg,
+          pkg.srcPath.join('index.tsx').value,
+          {},
+          workerConfigs.map(config => config.name)
+        ),
+        ...workerConfigs,
+      ] as MultiRspackOptions;
+    }
     case '@affine/electron-renderer': {
       const workerConfigs = getBaseWorkerConfigs(
         pkg,
-        createRspackWorkerTargetConfig
+        createRspackWorkerTargetConfig,
+        { includeMermaidAndTypst: false }
       );
 
       return [

tools/cli/src/rspack/index.ts

@@ -90,6 +90,22 @@ export function createHTMLTargetConfig(
   );
 
   const buildConfig = getBuildConfigFromEnv(pkg);
+  const codeBlockPreviewBackendFile =
+    buildConfig.distribution === 'desktop'
+      ? 'platform-backend.desktop.ts'
+      : buildConfig.distribution === 'ios' ||
+          buildConfig.distribution === 'android'
+        ? 'platform-backend.mobile.ts'
+        : 'platform-backend.ts';
+  const codeBlockPreviewBackendAlias = ProjectRoot.join(
+    'packages',
+    'frontend',
+    'core',
+    'src',
+    'modules',
+    'code-block-preview-renderer',
+    codeBlockPreviewBackendFile
+  ).value;
 
   console.log(
     `Building [${pkg.name}] for [${buildConfig.appBuildType}] channel in [${buildConfig.debug ? 'development' : 'production'}] mode.`
@@ -145,6 +161,8 @@ export function createHTMLTargetConfig(
           '@preact',
           'signals-core'
         ).value,
+        '@affine/core/modules/code-block-preview-renderer/platform-backend':
+          codeBlockPreviewBackendAlias,
       },
     },
     //#endregion

yarn.lock

@@ -431,6 +431,7 @@ __metadata:
     "@testing-library/dom": "npm:^10.4.0"
     "@testing-library/react": "npm:^16.1.0"
     "@toeverything/infra": "workspace:*"
+    "@toeverything/mermaid-wasm": "npm:^0.1.0"
     "@toeverything/pdf-viewer": "npm:^0.1.1"
     "@toeverything/theme": "npm:^1.1.23"
     "@types/animejs": "npm:^3.1.12"
@@ -447,6 +448,7 @@ __metadata:
     cmdk: "npm:^1.0.4"
     core-js: "npm:^3.39.0"
     dayjs: "npm:^1.11.13"
+    dompurify: "npm:^3.3.0"
     eventemitter2: "npm:^6.4.9"
     fake-indexeddb: "npm:^6.0.0"
     file-type: "npm:^21.0.0"
@@ -468,7 +470,7 @@ __metadata:
     lit: "npm:^3.2.1"
     lodash-es: "npm:^4.17.23"
     lottie-react: "npm:^2.4.0"
-    mermaid: "npm:^11.12.2"
+    mermaid: "npm:^11.13.0"
     mp4-muxer: "npm:^5.2.2"
     nanoid: "npm:^5.1.6"
     next-themes: "npm:^0.4.4"
@@ -1136,13 +1138,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@antfu/utils@npm:^9.2.0":
-  version: 9.2.1
-  resolution: "@antfu/utils@npm:9.2.1"
-  checksum: 10/c629769f5301d16851de18e241cc0c7547928b080929bcfd945735eb799d13029336236bfe869935e832f3e48f8b622caf5946738158b4dd4133701f19a9b75a
-  languageName: node
-  linkType: hard
-
 "@apollo/cache-control-types@npm:^1.0.3":
   version: 1.0.3
   resolution: "@apollo/cache-control-types@npm:1.0.3"
@@ -1736,6 +1731,7 @@ __metadata:
     "@toeverything/theme": "npm:^1.1.23"
     "@vitest/browser-playwright": "npm:^4.0.18"
     lit: "npm:^3.2.0"
+    playwright: "npm:=1.58.2"
     rxjs: "npm:^7.8.2"
     vitest: "npm:^4.0.18"
     yjs: "npm:^13.6.27"
@@ -2800,6 +2796,7 @@ __metadata:
     lit: "npm:^3.2.0"
     lit-html: "npm:^3.2.1"
     lodash-es: "npm:^4.17.23"
+    playwright: "npm:=1.58.2"
     rxjs: "npm:^7.8.2"
     vitest: "npm:^4.0.18"
     yjs: "npm:^13.6.27"
@@ -3610,6 +3607,7 @@ __metadata:
     "@vanilla-extract/vite-plugin": "npm:^5.0.0"
     "@vitest/browser-playwright": "npm:^4.0.18"
     lit: "npm:^3.2.0"
+    playwright: "npm:=1.58.2"
     rxjs: "npm:^7.8.2"
     vite: "npm:^7.2.7"
     vite-plugin-istanbul: "npm:^7.2.1"
@@ -3680,6 +3678,7 @@ __metadata:
     lit: "npm:^3.2.0"
     lodash-es: "npm:^4.17.23"
     lz-string: "npm:^1.5.0"
+    playwright: "npm:=1.58.2"
     rehype-parse: "npm:^9.0.0"
     rxjs: "npm:^7.8.2"
     unified: "npm:^11.0.5"
@@ -3740,9 +3739,9 @@ __metadata:
   linkType: hard
 
 "@braintree/sanitize-url@npm:^7.1.1":
-  version: 7.1.1
-  resolution: "@braintree/sanitize-url@npm:7.1.1"
-  checksum: 10/a8a5535c5a0a459ba593a018c554b35493dff004fd09d7147db67243df83bce3d410b89ee7dc2d95cce195b85b877c72f8ca149e1040110a945d193c67293af0
+  version: 7.1.2
+  resolution: "@braintree/sanitize-url@npm:7.1.2"
+  checksum: 10/d9626ff8f8eb5e192cd055e6e743449c21102c76bb59e405b7028fe56230fa080bfcc80dfb1e21850a6876e75adda9f7b3c888cf0685942bb74da4d2866d6ec3
   languageName: node
   linkType: hard
 
@@ -3855,45 +3854,45 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@chevrotain/cst-dts-gen@npm:11.0.3":
-  version: 11.0.3
-  resolution: "@chevrotain/cst-dts-gen@npm:11.0.3"
+"@chevrotain/cst-dts-gen@npm:11.1.2":
+  version: 11.1.2
+  resolution: "@chevrotain/cst-dts-gen@npm:11.1.2"
   dependencies:
-    "@chevrotain/gast": "npm:11.0.3"
-    "@chevrotain/types": "npm:11.0.3"
-    lodash-es: "npm:4.17.21"
-  checksum: 10/601d23fa3312bd0e32816bd3f9ca2dcba775a52192a082fd6c5e4a2e8ee068523401191babbe2c346d6d2551900a67b549f2f74d7ebb7d5b2ee1b6fa3c8857a0
+    "@chevrotain/gast": "npm:11.1.2"
+    "@chevrotain/types": "npm:11.1.2"
+    lodash-es: "npm:4.17.23"
+  checksum: 10/04a84285fd4d26129f44f8e20b99fd6ab51cb1ee4c7eb104baa4842413b9e18bb171046a665583b94ff29e2c06a2e1a65205940a75cda848aa2a5e847b99bbb6
   languageName: node
   linkType: hard
 
-"@chevrotain/gast@npm:11.0.3":
-  version: 11.0.3
-  resolution: "@chevrotain/gast@npm:11.0.3"
+"@chevrotain/gast@npm:11.1.2":
+  version: 11.1.2
+  resolution: "@chevrotain/gast@npm:11.1.2"
   dependencies:
-    "@chevrotain/types": "npm:11.0.3"
-    lodash-es: "npm:4.17.21"
-  checksum: 10/7169453a8fbfa994e91995523dea09eab87ab23062ad93f6e51f4a3b03f5e2958e0a8b99d5ca6fa067fccfbbbb8bcf1a4573ace2e1b5a455f6956af9eaccb35a
+    "@chevrotain/types": "npm:11.1.2"
+    lodash-es: "npm:4.17.23"
+  checksum: 10/8733cbadfcb982f5afe0e1825446ad8e82de3044c9ae22a69771ec20292facce25e459da23c16061c894ef49ca381ad53c0796171fa0dfce08fc25305850eeca
   languageName: node
   linkType: hard
 
-"@chevrotain/regexp-to-ast@npm:11.0.3":
-  version: 11.0.3
-  resolution: "@chevrotain/regexp-to-ast@npm:11.0.3"
-  checksum: 10/7387a1c61c5a052de41e1172b33eaaedea166fcdb1ffe4c381b86d00051a8014855a031d28fb658768a62c833ef5f5b0689d0c40de3d7bed556f8fea24396e69
+"@chevrotain/regexp-to-ast@npm:11.1.2":
+  version: 11.1.2
+  resolution: "@chevrotain/regexp-to-ast@npm:11.1.2"
+  checksum: 10/9ba399b2c23ae1a86f1bcb1db4b07fd3191d0f491b63303b824850ef5f8b455f8f8a39c4d7876271c23ca06f7e03b7273b07014cd9c8ccb2328bff5dc6c9df00
   languageName: node
   linkType: hard
 
-"@chevrotain/types@npm:11.0.3":
-  version: 11.0.3
-  resolution: "@chevrotain/types@npm:11.0.3"
-  checksum: 10/49a82b71d2de8ceb2383ff2709fa61d245f2ab2e42790b70c57102c80846edaa318d0b3645aedc904d23ea7bd9be8a58f2397b1341760a15eb5aa95a1336e2a9
+"@chevrotain/types@npm:11.1.2":
+  version: 11.1.2
+  resolution: "@chevrotain/types@npm:11.1.2"
+  checksum: 10/ad39d7651a20b05ead9b4374f98afc39915118dda29678c2b623571aa3da3018a0f3fb799d1809605cafcae59cba637d640855ea0f97b9b01d0900d77d6781fe
   languageName: node
   linkType: hard
 
-"@chevrotain/utils@npm:11.0.3":
-  version: 11.0.3
-  resolution: "@chevrotain/utils@npm:11.0.3"
-  checksum: 10/29b5d84373a7761ad055c53e2f540a67b5b56550d5be1c473149f6b8923eef87ff391ce021c06ac7653843b0149f6ff0cf30b5e48c3f825d295eb06a6c517bd3
+"@chevrotain/utils@npm:11.1.2":
+  version: 11.1.2
+  resolution: "@chevrotain/utils@npm:11.1.2"
+  checksum: 10/a5ba5886547665726e6680bdc6e1c939e643c8c606d8eb3806ed178ebb2c3a8a1a581db558412374f230babfe9d8c1c37f2c3edf260c63729dbe6ff9ca4f0223
   languageName: node
   linkType: hard
 
@@ -6391,19 +6390,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@iconify/utils@npm:^3.0.1":
-  version: 3.0.2
-  resolution: "@iconify/utils@npm:3.0.2"
+"@iconify/utils@npm:^3.0.2":
+  version: 3.1.0
+  resolution: "@iconify/utils@npm:3.1.0"
   dependencies:
     "@antfu/install-pkg": "npm:^1.1.0"
-    "@antfu/utils": "npm:^9.2.0"
     "@iconify/types": "npm:^2.0.0"
-    debug: "npm:^4.4.1"
-    globals: "npm:^15.15.0"
-    kolorist: "npm:^1.8.0"
-    local-pkg: "npm:^1.1.1"
-    mlly: "npm:^1.7.4"
-  checksum: 10/b2db57b6a6b06d618b2625bf7bd056219a6c65e71a86c79c664d5e5fe03e531bc74fdd9cfa4d74e2ea469b6cd92b63012e2d588b32cade5aa7e3c31bc5124789
+    mlly: "npm:^1.8.0"
+  checksum: 10/28e83311ec7eca3f94a9c128c6d6f0f6aa68b7a63bcac44d08a1ea6f94d3752a7447a4354f3d02fdcdbf782ba033784ef7a65212b3afe52d9b41ef8138e96b14
   languageName: node
   linkType: hard
 
@@ -7531,12 +7525,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@mermaid-js/parser@npm:^0.6.3":
-  version: 0.6.3
-  resolution: "@mermaid-js/parser@npm:0.6.3"
+"@mermaid-js/parser@npm:^1.0.1":
+  version: 1.0.1
+  resolution: "@mermaid-js/parser@npm:1.0.1"
   dependencies:
-    langium: "npm:3.3.1"
-  checksum: 10/ab8bbdeaf2ef556871f3267541c0b3621d70c4d108ddac36383adc7eb1c7e6bed28d068b4ad196b54314877f263f939f90f0a1a3cfe8576fab30f4514732aa2f
+    langium: "npm:^4.0.0"
+  checksum: 10/648c96da8464113c3694587f3f950421b1914d34fddc194b6dff7a8c28da5e37273ddc4d56a4efaeda82e93c7a168389f035dbac6c8d5b65930ee60b5063ece4
   languageName: node
   linkType: hard
 
@@ -15772,6 +15766,13 @@ __metadata:
   languageName: unknown
   linkType: soft
 
+"@toeverything/mermaid-wasm@npm:^0.1.0":
+  version: 0.1.1
+  resolution: "@toeverything/mermaid-wasm@npm:0.1.1"
+  checksum: 10/4b701f19aad5fbe42ddec9d63c6e3cf7641ff1ab9277142db7adcde3e9b81315e2d35cfab82acead79bb81d560eef10d1d7522ab17cca300e6dae45db0380eab
+  languageName: node
+  linkType: hard
+
 "@toeverything/pdf-viewer-types@npm:0.1.1":
   version: 0.1.1
   resolution: "@toeverything/pdf-viewer-types@npm:0.1.1"
@@ -17488,6 +17489,21 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@upsetjs/venn.js@npm:^2.0.0":
+  version: 2.0.0
+  resolution: "@upsetjs/venn.js@npm:2.0.0"
+  dependencies:
+    d3-selection: "npm:^3.0.0"
+    d3-transition: "npm:^3.0.1"
+  dependenciesMeta:
+    d3-selection:
+      optional: true
+    d3-transition:
+      optional: true
+  checksum: 10/84505be440490666566a6f59e765e1f24b154e4ca45cfed9102f02261be45912149f706e21b3cc7a6247816a8703e1f1b667561295b587c6dcc3162a9a48a5f2
+  languageName: node
+  linkType: hard
+
 "@vanilla-extract/babel-plugin-debug-ids@npm:^1.2.2":
   version: 1.2.2
   resolution: "@vanilla-extract/babel-plugin-debug-ids@npm:1.2.2"
@@ -18149,7 +18165,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"acorn@npm:^8.11.0, acorn@npm:^8.14.0, acorn@npm:^8.15.0, acorn@npm:^8.16.0, acorn@npm:^8.6.0, acorn@npm:^8.8.2":
+"acorn@npm:^8.11.0, acorn@npm:^8.15.0, acorn@npm:^8.16.0, acorn@npm:^8.6.0, acorn@npm:^8.8.2":
   version: 8.16.0
   resolution: "acorn@npm:8.16.0"
   bin:
@@ -19740,7 +19756,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"chevrotain-allstar@npm:~0.3.0":
+"chevrotain-allstar@npm:~0.3.1":
   version: 0.3.1
   resolution: "chevrotain-allstar@npm:0.3.1"
   dependencies:
@@ -19751,17 +19767,17 @@ __metadata:
   languageName: node
   linkType: hard
 
-"chevrotain@npm:~11.0.3":
-  version: 11.0.3
-  resolution: "chevrotain@npm:11.0.3"
+"chevrotain@npm:~11.1.1":
+  version: 11.1.2
+  resolution: "chevrotain@npm:11.1.2"
   dependencies:
-    "@chevrotain/cst-dts-gen": "npm:11.0.3"
-    "@chevrotain/gast": "npm:11.0.3"
-    "@chevrotain/regexp-to-ast": "npm:11.0.3"
-    "@chevrotain/types": "npm:11.0.3"
-    "@chevrotain/utils": "npm:11.0.3"
-    lodash-es: "npm:4.17.21"
-  checksum: 10/8fa6253e51320dd4c3d386315b925734943e509d7954a2cd917746c0604461191bea57b0fb8fbab1903e0508fd94bfd35ebd0f8eace77cd0f3f42a9ee4f8f676
+    "@chevrotain/cst-dts-gen": "npm:11.1.2"
+    "@chevrotain/gast": "npm:11.1.2"
+    "@chevrotain/regexp-to-ast": "npm:11.1.2"
+    "@chevrotain/types": "npm:11.1.2"
+    "@chevrotain/utils": "npm:11.1.2"
+    lodash-es: "npm:4.17.23"
+  checksum: 10/67caa47a3d38eeb4a584960bbf5fdc83894a1419a6428f7dcf8a07f5937c1bda4c8e1acf628fe80d3be8f4c1a84426942c0a8f6bcf44a5958f1df0cf4225bc4d
   languageName: node
   linkType: hard
 
@@ -21051,7 +21067,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"cytoscape@npm:^3.29.3":
+"cytoscape@npm:^3.33.1":
   version: 3.33.1
   resolution: "cytoscape@npm:3.33.1"
   checksum: 10/0e8d3ea87eb624899341d6a765cfb732199af8a871beedeb94971061632ce814c2c39e8257d6628c5611ca9dadc1a723a00377d04f149e0d24f6c133a6ab8647
@@ -21196,9 +21212,9 @@ __metadata:
   linkType: hard
 
 "d3-format@npm:1 - 3, d3-format@npm:3":
-  version: 3.1.0
-  resolution: "d3-format@npm:3.1.0"
-  checksum: 10/a0fe23d2575f738027a3db0ce57160e5a473ccf24808c1ed46d45ef4f3211076b34a18b585547d34e365e78dcc26dd4ab15c069731fc4b1c07a26bfced09ea31
+  version: 3.1.2
+  resolution: "d3-format@npm:3.1.2"
+  checksum: 10/811d913c2c7624cb0d2a8f0ccd7964c50945b3de3c7f7aa14c309fba7266a3ec53cbee8c05f6ad61b2b65b93e157c55a0e07db59bc3180c39dac52be8e841ab1
   languageName: node
   linkType: hard
 
@@ -21295,7 +21311,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"d3-selection@npm:2 - 3, d3-selection@npm:3":
+"d3-selection@npm:2 - 3, d3-selection@npm:3, d3-selection@npm:^3.0.0":
   version: 3.0.0
   resolution: "d3-selection@npm:3.0.0"
   checksum: 10/0e5acfd305b31628b7be5009ba7303d84bb34817a88ed4dde9c8bd9c23528573fc5272f89fc04e5be03d2cbf5441a248d7274aaf55a8ef3dad46e16333d72298
@@ -21345,7 +21361,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"d3-transition@npm:2 - 3, d3-transition@npm:3":
+"d3-transition@npm:2 - 3, d3-transition@npm:3, d3-transition@npm:^3.0.1":
   version: 3.0.1
   resolution: "d3-transition@npm:3.0.1"
   dependencies:
@@ -21411,13 +21427,13 @@ __metadata:
   languageName: node
   linkType: hard
 
-"dagre-d3-es@npm:7.0.13":
-  version: 7.0.13
-  resolution: "dagre-d3-es@npm:7.0.13"
+"dagre-d3-es@npm:7.0.14":
+  version: 7.0.14
+  resolution: "dagre-d3-es@npm:7.0.14"
   dependencies:
     d3: "npm:^7.9.0"
     lodash-es: "npm:^4.17.21"
-  checksum: 10/f6dbd373b85cc9fbcb23fba996656a0336ba48bc46f1e6d31c582418a5086caf230a4e8178b90acd7b1d14b090cbba2db50dc64484d67cf9c8856a4a2fe30cf0
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